act out

verb

acted out; acting out; acts out

transitive verb

1

a

: to represent in action

children act out what they read

b

: to translate into action

unwilling to act out their beliefs

2

: to express (something, such as an impulse or a fantasy) directly in overt behavior without modification to comply with social norms

intransitive verb

: to behave badly or in a socially unacceptable often self-defeating manner especially as a means of venting painful emotions (such as fear or frustration)

Synonyms of act out

• misconduct
• disobey
• carry on
• run riot
• act up
• rebel
• raise Cain

Examples of act out in a Sentence

because his parents spent so much time with his chronically ill sister, the boy resorted to acting out in order to get attention

Recent Examples on the Web

Whether defendant Tyler Robinson acted out of political animus could be key for prosecutors seeking the death penalty — or for his attorneys in taking that punishment off the table. — ABC News, 19 Aug. 2026

Whether defendant Tyler Robinson acted out of political animus could be key for prosecutors seeking the death penalty - or for his attorneys in taking that punishment off the table. — CBS News, 19 Aug. 2026

When the child started acting out at home, his family reportedly started asking questions of the boy and made a report to law enforcement. — Mary Whitfill Roeloffs, Forbes.com, 18 Aug. 2026

Perhaps the threat wasn’t quite so dire, or its parameters were not well-enough defined, and the Secret Service acted out of a superabundance of caution. — Tom Nichols, The Atlantic, 12 Aug. 2026

Word History

First Known Use

circa 1616, in the meaning defined at transitive sense 1a

Rhymes for act out

• about
• bailout
• blackout
• blowout
• breakout
• burnout
• buyout
• checkout
• closeout
• cutout
• devout
• dropout

Kids Definition

act out

verb

1

: to represent in action

children act out what they read

2

: to behave badly especially as a way of letting out painful emotions

Medical Definition

act out

transitive verb

(ˈ)akt-ˈau̇t 

: to express (as an impulse or a fantasy) directly in overt behavior without modification to comply with social norms

act out an adolescent fantasy

intransitive verb

: to behave badly or in a socially unacceptable often self-defeating manner especially as a means of venting painful emotions (as fear or frustration)