Act Definition

ăkt
acted, acting, acts
noun
acts
The process of doing or performing something.
The act of thinking.
American Heritage
A thing done; deed.
Webster's New World
Something done or performed; a deed.
A charitable act.
American Heritage
An action; doing.
Caught in the act of stealing.
Webster's New World
Something done that has legal significance.
A criminal act.
American Heritage
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verb
acted, acting, acts
To play the part of; assume the dramatic role of.
She plans to act Ophelia in summer stock.
American Heritage
To play the part of.
Webster's New World
To perform in a play, film, etc.; play a role.
Webster's New World
To perform (a role) on the stage.
Act the part of the villain.
American Heritage
To perform in (a play)
Webster's New World
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abbreviation
Australian Capital Territory.
American Heritage
Active.
Webster's New World
American College Test.
Webster's New World
adjective

Abbreviation of acting.

Wiktionary

(grammar) Abbreviation of active.

Wiktionary

Abbreviation of actual.

Wiktionary
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other
A trademark for a standardized college entrance examination.
American Heritage
idiom
be in on the act
  • To be included in an activity.
American Heritage
clean up (one's) act
  • To improve one's behavior or performance.
American Heritage
get into the act
  • To insert oneself into an ongoing activity, project, or situation.
American Heritage
get (one's) act together
  • To get organized.
American Heritage
act out
  • to behave in a way that unconsciously expresses (feelings that were repressed in an earlier situation)
Webster's New World
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Other Word Forms of Act

Noun

Singular:
act
Plural:
Acts

Origin of Act

  • Middle English from Old French acte from Latin āctus a doing, āctum a thing done both from past participle of agere to drive, do ag- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Old French acte, from Latin ācta (“register of events”), plural of āctum (“decree, law”), from agō (“put in motion”).

    From Wiktionary

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