Ask Difference

Discharge vs. Exhaust — What's the Difference?

Edited by Tayyaba Rehman — By Fiza Rafique — Updated on May 17, 2024
Discharge refers to the release or expulsion of substances, while exhaust specifically denotes the expulsion of gases or fumes from an engine.
Discharge vs. Exhaust — What's the Difference?

Difference Between Discharge and Exhaust

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Key Differences

Discharge generally refers to the release or expulsion of substances, including liquids, solids, gases, or even people from a place. Exhaust, on the other hand, specifically refers to the release of gases or fumes, typically from an engine or mechanical system. It is commonly associated with the emission of waste gases from vehicles or industrial processes.
In a medical context, discharge can refer to bodily fluids being expelled, such as nasal discharge or wound discharge. Exhaust does not apply in this context, as it is not related to bodily functions but rather to mechanical and industrial emissions.
Environmentally, discharge can refer to the release of pollutants into water bodies, whereas exhaust pertains to air pollution caused by the release of gases from engines or industrial processes.
Discharge can occur in various forms and scenarios, such as legal (discharge from prison) or financial (discharge of a debt). Exhaust, however, is more specific to mechanical systems and the release of waste gases.

Comparison Chart

Definition

Release or expulsion of substances
Expulsion of gases or fumes
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Contexts

Medical, legal, electrical, financial
Mechanical, automotive, industrial

Form

Can be liquid, solid, gas, or people
Specifically gases or fumes

Medical Usage

Refers to bodily fluids
Not applicable

Environmental Impact

Pollutants in water bodies
Air pollution from combustion processes

Compare with Definitions

Discharge

The completion or fulfillment of an obligation.
After serving 20 years, he was granted an honorable discharge from the army.

Exhaust

The emission of gases or fumes from an engine.
The car's exhaust system was leaking, causing loud noises and poor performance.

Discharge

To release, as from confinement, care, or duty
Discharge a patient.
Discharge a soldier.

Exhaust

Waste gases emitted from combustion processes.
The exhaust from the factory's chimneys contributes to air pollution.

Discharge

To let go; empty out
A train discharging commuters.

Exhaust

The system or part of a machine through which gases are expelled.
The mechanic replaced the rusted exhaust pipe with a new one.

Discharge

To pour forth; emit
A vent discharging steam.

Exhaust

To tire out or deplete energy.
The strenuous workout exhausted her completely.

Discharge

To shoot
Discharge a pistol.

Exhaust

To make extremely weary; wear out.

Discharge

To remove from office or employment.

Exhaust

To escape or pass out
Steam exhausts through this valve.

Discharge

To perform the obligations or demands of (an office, duty, or task).

Exhaust

The escape or release of vaporous waste material, as from an engine.

Discharge

To comply with the terms of (a debt or promise, for example).

Exhaust

The fumes or gases so released.

Discharge

(Law) To release from debt, as in bankruptcy.

Exhaust

A duct or pipe through which waste material is emitted.

Discharge

To remove (color) from cloth, as by chemical bleaching.

Exhaust

An apparatus for drawing out noxious air or waste material by means of a partial vacuum.

Discharge

(Electricity) To cause the release of stored energy or electric charge from (a battery, for example).

Exhaust

(transitive) To draw or let out wholly; to drain off completely.
The water was exhausted out of the well.
Moisture of the earth is exhausted by evaporation.

Discharge

To apportion (weight) evenly, as over a door.

Exhaust

(transitive) To empty by drawing or letting out the contents
To exhaust a well
To exhaust a treasury

Discharge

To relieve (a part) of excess weight by distribution of pressure.

Exhaust

To use up; to deplete, drain or expend wholly, or until the supply comes to an end
My grandfather seemingly never exhausts his supply of bad jokes.
To exhaust one's resources
To exhaust all possibilities
You're exhausting my patience.
I exhausted my strength walking up the hill.

Discharge

To clear the record of the loan of (a returned library book).

Exhaust

(transitive) To tire out; to wear out; to cause to be without any energy.
The marathon exhausted me.

Discharge

To relieve (a ship, for example) of a burden or of contents; unload.

Exhaust

(transitive) To discuss thoroughly or completely.
That subject has already been fully exhausted.

Discharge

To unload or empty (contents).

Exhaust

To subject to the action of various solvents in order to remove all soluble substances or extractives.
To exhaust a drug successively with water, alcohol, and ether

Discharge

To go off; fire
The musket discharged loudly.

Exhaust

To expel (as exhaust).

Discharge

To pour forth, emit, or release contents.

Exhaust

(intransitive) To discharge or escape (as exhaust).

Discharge

To become blurred, as a color or dye; run.

Exhaust

A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.

Discharge

To undergo the release of stored energy or electric charge.

Exhaust

The steam let out of a cylinder after it has done its work there.

Discharge

To get rid of a burden, load, or weight.

Exhaust

The dirty air let out of a room through a register or pipe provided for the purpose.

Discharge

The act of shooting or firing a projectile or weapon.

Exhaust

An exhaust pipe, especially on a motor vehicle.

Discharge

A flowing out or pouring forth; emission; secretion
A discharge of pus.

Exhaust

Exhaust gas.

Discharge

The amount or rate of emission or ejection.

Exhaust

(obsolete) Exhausted; used up.

Discharge

Something that is discharged, released, emitted, or excreted
A watery discharge.

Exhaust

To draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation.

Discharge

The act or an instance of removing an obligation, burden, or responsibility.

Exhaust

To empty by drawing or letting out the contents; as, to exhaust a well, or a treasury.

Discharge

Fulfillment of the terms of something, such as a debt or promise.

Exhaust

To drain, metaphorically; to use or expend wholly, or till the supply comes to an end; to deprive wholly of strength; to use up; to weary or tire out; to wear out; as, to exhaust one's strength, patience, or resources.
A decrepit, exhausted old man at fifty-five.

Discharge

Performance, as of an office or duty.

Exhaust

To bring out or develop completely; to discuss thoroughly; as, to exhaust a subject.

Discharge

Dismissal or release from employment, service, care, or confinement.

Exhaust

To subject to the action of various solvents in order to remove all soluble substances or extractives; as, to exhaust a drug successively with water, alcohol, and ether.

Discharge

An official document certifying such release, especially from military service.

Exhaust

Drained; exhausted; having expended or lost its energy.

Discharge

Release of stored energy in a capacitor by the flow of current between its terminals.

Exhaust

Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work.

Discharge

Conversion of chemical energy to electric energy in a storage battery.

Exhaust

The steam let out of a cylinder after it has done its work there.

Discharge

A flow of electricity in a dielectric, especially in a rarefied gas.

Exhaust

The foul air let out of a room through a register or pipe provided for the purpose.

Discharge

Elimination of net electric charge from a charged body.

Exhaust

Gases ejected from an engine as waste products

Discharge

The act of removing a load or burden.

Exhaust

System consisting of the parts of an engine through which burned gases or steam are discharged

Discharge

To accomplish or complete, as an obligation.

Exhaust

Wear out completely;
This kind of work exhausts me
I'm beat
He was all washed up after the exam

Discharge

To free of a debt, claim, obligation, responsibility, accusation, etc.; to absolve; to acquit; to forgive; to clear.

Exhaust

Use up (resources or materials);
This car consumes a lot of gas
We exhausted our savings
They run through 20 bottles of wine a week

Discharge

To send away (a creditor) satisfied by payment; to pay one's debt or obligation to.

Exhaust

Deplete;
Exhaust one's savings
We quickly played out our strength

Discharge

To set aside; to annul; to dismiss.

Exhaust

Use up the whole supply of;
We have exhausted the food supplies

Discharge

To expel or let go.

Exhaust

Create a vacuum in (a bulb, flask, reaction vessel, etc.)

Discharge

To let fly, as a missile; to shoot.

Exhaust

The act of using up a resource completely.
After hours of hiking, they had exhausted their water supply.

Discharge

(electricity) To release (an accumulated charge).

Discharge

To relieve of an office or employment; to send away from service; to dismiss.

Discharge

(medicine) To release (an inpatient) from hospital.

Discharge

(military) To release (a member of the armed forces) from service.

Discharge

To release legally from confinement; to set at liberty.
To discharge a prisoner

Discharge

To operate (any weapon that fires a projectile, such as a shotgun or sling).

Discharge

(logic) To release (an auxiliary assumption) from the list of assumptions used in arguments, and return to the main argument.

Discharge

To unload a ship or another means of transport.

Discharge

To put forth, or remove, as a charge or burden; to take out, as that with which anything is loaded or filled.
To discharge a cargo

Discharge

To give forth; to emit or send out.
A pipe discharges water.

Discharge

To let fly; to give expression to; to utter.
He discharged a horrible oath.

Discharge

To bleach out or to remove or efface, as by a chemical process.
To discharge the colour from a dyed fabric in order to form light figures on a dark background

Discharge

To prohibit; to forbid.

Discharge

Pus or exudate (other than blood) from a wound or orifice, usually due to infection or pathology.

Discharge

The act of accomplishing (an obligation) or repaying a debt etc.; performance.

Discharge

The act of expelling or letting go.

Discharge

The act of firing a projectile, especially from a firearm.

Discharge

The process of unloading something.

Discharge

The process of flowing out.

Discharge

(electricity) The act of releasing an accumulated charge.

Discharge

(medicine) The act of releasing an inpatient from hospital.

Discharge

(military) The act of releasing a member of the armed forces from service.

Discharge

(hydrology) The volume of water transported by a river in a certain amount of time, usually in units of m3/s (cubic meters per second).

Discharge

To relieve of a charge, load, or burden; to empty of a load or cargo; to unburden; to unload; as, to discharge a vessel.

Discharge

To free of the missile with which anything is charged or loaded; to let go the charge of; as, to discharge a bow, catapult, etc.; especially, said of firearms, - to fire off; to shoot off; also, to relieve from a state of tension, as a Leyden jar.
The galleys also did oftentimes, out of their prows, discharge their great pieces against the city.
Feeling in other cases discharges itself in indirect muscular actions.

Discharge

To of something weighing upon or impeding over one, as a debt, claim, obligation, responsibility, accusation, etc.; to absolve; to acquit; to clear.
Discharged of business, void of strife.
In one man's fault discharge another man of his duty.

Discharge

To relieve of an office or employment; to send away from service; to dismiss.
Discharge the common sortWith pay and thanks.
Grindal . . . was discharged the government of his see.

Discharge

To release legally from confinement; to set at liberty; as, to discharge a prisoner.

Discharge

To put forth, or remove, as a charge or burden; to take out, as that with which anything is loaded or filled; as, to discharge a cargo.

Discharge

To let fly, as a missile; to shoot.
They do discharge their shot of courtesy.

Discharge

To set aside; to annul; to dismiss.
We say such an order was "discharged on appeal."
The order for Daly's attendance was discharged.

Discharge

To throw off the obligation of, as a duty or debt; to relieve one's self of, by fulfilling conditions, performing duty, trust, and the like; hence, to perform or execute, as an office, or part.
Had I a hundred tongues, a wit so largeAs could their hundred offices discharge.

Discharge

To send away (a creditor) satisfied by payment; to pay one's debt or obligation to.
If he hadThe present money to discharge the Jew.

Discharge

To give forth; to emit or send out; as, a pipe discharges water; to let fly; to give expression to; to utter; as, to discharge a horrible oath.

Discharge

To prohibit; to forbid.

Discharge

To bleach out or to remove or efface, as by a chemical process; as, to discharge the color from a dyed fabric in order to form light figures on a dark ground.

Discharge

To throw off or deliver a load, charge, or burden; to unload; to emit or give vent to fluid or other contents; as, the water pipe discharges freely.
The cloud, if it were oily or fatty, would not discharge.

Discharge

The act of discharging; the act of relieving of a charge or load; removal of a load or burden; unloading; as, the discharge of a ship; discharge of a cargo.

Discharge

Firing off; explosive removal of a charge; explosion; letting off; as, a discharge of arrows, of artillery.

Discharge

Act of relieving of something which oppresses or weighs upon one, as an obligation, liability, debt, accusation, etc.; acquittance; as, the discharge of a debtor.

Discharge

Act of removing, or getting rid of, an obligation, liability, etc.; fulfillment, as by the payment of a debt, or the performance of a trust or duty.
Indefatigable in the discharge of business.
Nothing can absolve us from the discharge of those duties.

Discharge

Release or dismissal from an office, employment, etc.; dismission; as, the discharge of a workman by his employer.

Discharge

Legal release from confinement; liberation; as, the discharge of a prisoner.

Discharge

The state of being discharged or relieved of a debt, obligation, office, and the like; acquittal.
Too secure of our dischargeFrom penalty.

Discharge

That which discharges or releases from an obligation, liability, penalty, etc., as a price of ransom, a legal document.
Death, who sets all free,Hath paid his ransom now and full discharge.

Discharge

A flowing or issuing out; emission; vent; evacuation; also, that which is discharged or emitted; as, a rapid discharge of water from the pipe.
The hemorrhage being stopped, the next occurrence is a thin serous discharge.

Discharge

The equalization of a difference of electric potential between two points. The character of the discharge is mostly determined by the nature of the medium through which it takes place, the amount of the difference of potential, and the form of the terminal conductors on which the difference exists. The discharge may be alternating, continuous, brush, connective, disruptive, glow, oscillatory, stratified, etc.

Discharge

The sudden giving off of energy

Discharge

The act of venting

Discharge

A substance that is emitted or released

Discharge

Any of several bodily processes by which substances go out of the body;
The discharge of pus

Discharge

Electrical conduction through a gas in an applied electric field

Discharge

The pouring forth of a fluid

Discharge

The termination of someone's employment (leaving them free to depart)

Discharge

A formal written statement of relinquishment

Discharge

The act of discharging a gun

Discharge

Complete or carry out;
Discharge one's duties

Discharge

Pour forth or release;
Discharge liquids

Discharge

Eliminate (substances) from the body

Discharge

Free from obligations or duties

Discharge

Remove the charge from

Discharge

Go off or discharge;
The gun fired

Discharge

Pronounce not guilty of criminal charges;
The suspect was cleared of the murder charges

Discharge

Leave or unload, especially of passengers or cargo;

Discharge

Cause to go off;
Fire a gun
Fire a bullet

Discharge

Release from military service

Discharge

Become empty or void of its content;
The room emptied

Discharge

The release of a substance from a container or body.
The factory was fined for the illegal discharge of chemicals into the river.

Discharge

The act of expelling a liquid or gas.
The patient's wound had a significant discharge that needed to be cleaned.

Discharge

The release from a hospital or institution.
She received her discharge papers from the hospital after recovering from surgery.

Discharge

The emission of energy or particles.
The capacitor can hold a charge until it discharges.

Common Curiosities

Can discharge refer to legal matters?

Yes, discharge can refer to the release from legal obligations, such as discharge from prison or military service.

Is discharge always related to fluids?

No, discharge can refer to the release of any substance, including gases, solids, or even people.

What are common sources of exhaust?

Common sources of exhaust include car engines, industrial machines, and power plants.

What is exhaust in automotive terms?

Exhaust in automotive terms refers to the gases expelled from a vehicle's engine through its exhaust system.

Can discharge be used in a financial context?

Yes, discharge can refer to the settlement or cancellation of a debt.

What types of substances can be discharged?

Substances discharged can include liquids, gases, solids, or even individuals (e.g., from a hospital).

Can discharge have environmental impacts?

Yes, the discharge of pollutants into water bodies or the environment can have significant negative impacts.

What does discharge mean in a medical context?

In a medical context, discharge refers to the release of bodily fluids, such as mucus or pus.

What is an exhaust system in a car?

An exhaust system in a car is the system designed to expel combustion gases from the engine safely.

Can discharge refer to energy release?

Yes, discharge can refer to the release of electrical energy from a capacitor or battery.

Is exhaust always related to engines?

While commonly associated with engines, exhaust can also refer to waste gases from other combustion processes.

What are exhaust emissions?

Exhaust emissions are gases released from the combustion process in engines, often containing pollutants.

What does it mean to be exhausted?

Being exhausted means being extremely tired or depleted of energy, unrelated to the mechanical term exhaust.

How does exhaust contribute to pollution?

Exhaust gases, especially from vehicles and industrial processes, contain pollutants that contribute to air pollution.

What is the purpose of an exhaust pipe?

The exhaust pipe directs and releases the waste gases from an engine to the atmosphere.

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Author Spotlight

Written by
Fiza Rafique
Fiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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