From Old French acte, from Latin ācta (“register of events”), plural of āctum (“decree, law”), from agō (“put in motion”). Compare German Akte (“file”).
act (countable and uncountable, plural acts)
- (countable) Something done, a deed.
- (obsolete, uncountable) Actuality.
- (theology) Something done once and for all, as distinguished from a work.
- (countable) A product of a legislative body, a statute.
- The process of doing something.
- (countable) A formal or official record of something done.
- (countable, drama) A division of a theatrical performance.
- (countable) A performer or performers in a show.
- (countable) Any organized activity.
- (countable) A display of behaviour.
- A thesis maintained in public, in some English universities, by a candidate for a degree, or to show the proficiency of a student.
- (countable) A display of behaviour meant to deceive.
act (third-person singular simple present acts, present participle acting, simple past and past participle acted)
- (intransitive) To do something.
- (obsolete, transitive) To do (something); to perform.
- (intransitive) To perform a theatrical role.
- (intransitive) Of a play: to be acted out (well or badly).
- (intransitive) To behave in a certain way.
- (copulative) To convey an appearance of being.
- (intransitive) To do something that causes a change binding on the doer.
- (intransitive, construed with on or upon) To have an effect (on).
- (transitive) To play (a role).
- (transitive) To feign.
- (mathematics, intransitive, construed with on or upon, of a group) To map via a homomorphism to a group of automorphisms (of).
- (obsolete, transitive) To move to action; to actuate; to animate.