Noun

(en noun)

A device that directs and controls energy, often in the form of movement or electricity, to produce a certain effect.

* {{quote-magazine, title=A better waterworks, date=2013-06-01, volume=407, issue=8838

, page=5 (Technology Quarterly), magazine=(The Economist) citation , passage=An artificial kidney these days still means a refrigerator-sized dialysis machine . Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine.}}

(archaic) A vehicle operated mechanically; an automobile.

(telephony, abbreviation) An answering machine or, by extension, voice mail.

(computing) A computer.

(figuratively) A person or organisation that seemingly acts like a machine, being particularly efficient, single-minded, or unemotional.

Especially, the group that controls a political or similar organization; a combination of persons acting together for a common purpose, with the agencies which they use.

* Landor

The whole machine of government ought not to bear upon the people with a weight so heavy and oppressive.

Supernatural agency in a poem, or a superhuman being introduced to perform some exploit.

(Addison)

(euphemistic, obsolete) Penis.

{{quote-Fanny Hill, part=3 , He now resumes his attempts in more form: first, he put one of the pillows under me, to give the blank of his aim a more favourable elevation, and another under my head, in ease of it; then spreading my thighs, and placing himself standing between them, made them rest upon his hips; applying then the point of his machine to the slit, into which he sought entrance.}}

Noun

(en noun)

One who exerts power, or has the power to act; an actor.

Heaven made us agents , free to good or ill. --Dryden.

One who acts for, or in the place of, another (the principal), by authority from him; one intrusted with the business of another; a substitute; a deputy; a factor.

I see in him [Moby Dick] outrageous strength, with an inscrutable malice sinewing it. That inscrutable thing is chiefly what I hate; and be the white whale agent , or be the white whale principal, I will wreak that hate upon him. --Herman Melville, , ch. 36

An active power or cause; that which has the power to produce an effect; as, a physical, chemical, or medicinal agent ; as, heat is a powerful agent.

(computing) In the client-server model, the part of the system that performs information preparation and exchange on behalf of a client or server. Especially in the phrase “intelligent agent” it implies some kind of autonomous process which can communicate with other agents to perform some collective task on behalf of one or more humans.

(grammar) The participant of a situation that carries out the action in this situation, e.g. "the boy" in the sentences "The boy kicked the ball" and "The ball was kicked by the boy".