A2verb1K

Act

UK /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/US /["/ækt/","/ækts/","/ˈæktɪd/","/ˈæktɪŋ/"]/

Definition

to do something for a particular purpose or in order to deal with a situation

In simple words: To do something or take action.

Examples

  • She decided to act in the school play this year.
  • He didn't know how to act in such a tense situation.
  • The committee will act on the proposal next week.
  • They act as if they own the place.
  • Can you act out the scene from the movie for us?

Usage notes

Use 'act' in both formal and informal contexts when referring to behavior. Avoid using it in overly casual settings when describing serious actions.

Grammar pattern

act + on (something), act + like (someone/something)

Memory hint

Think of an 'actor' — they 'act' in a play.

Collocations

  • at once
  • immediately
  • promptly
  • against
  • for somebody
  • on behalf of somebody
  • act as if
  • act in somebody’s best interests
  • act in good faith
  • at once
  • immediately
  • promptly
  • against
  • for somebody
  • on behalf of somebody
  • act as if
  • act in somebody’s best interests
  • act in good faith
  • brilliantly
  • well
  • badly
  • brilliantly
  • well
  • badly

Synonyms

  • perform
  • execute
  • conduct
  • behave
  • react

Antonyms

  • ignore
  • neglect
  • refrain

Common mistakes

  • 'Act' is sometimes confused with 'take action', which has a slightly different connotation.
  • Learners often omit the preposition when using 'act on' phrases.
  • 'Act' may be incorrectly used as a noun instead of a verb.