acting

American  

[ak-ting] / ˈæk tɪŋ /

adjective

1. serving temporarily, especially as a substitute during another's absence; not permanent; temporary.

   the acting mayor.

   Synonyms:

   interim, provisional

2. designed, adapted, or suitable for stage performance.

3. provided with detailed stage directions for the performer.

   an acting version of a play.

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noun

1. the art, profession, or activity of those who perform in stage plays, motion pictures, etc.

acting British  

/ ˈæktɪŋ /

adjective

1. taking on duties temporarily, esp as a substitute for another

   the acting president

2. operating or functioning

   an acting order

3. intended for stage performance; provided with directions for actors

   an acting version of ``Hedda Gabler''

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noun

1. the art or profession of an actor

Other Word Forms

• proacting adjective
• unacting adjective

Etymology

Origin of acting

First recorded in 1595–1605; act + -ing ², -ing ¹

Example Sentences

He thinks trials will show that ORKA-001 is more effective than Skyrizi, and not just longer acting.

From Barron's • Apr. 10, 2026

There have been several rounds of talks, with the US acting as a mediator, but the process has been on hold since Donald Trump shifted his focus to the Middle East.

From BBC • Apr. 9, 2026

You’re acting with others, not only for yourself, and you’re going forward with shared values that imply historical meaning, which has its own force.

From The Wall Street Journal • Apr. 9, 2026

The spiders benefit humans by acting as natural pest control, eating mosquitoes, biting flies and invasive stink bugs.

From Los Angeles Times • Apr. 9, 2026

There’s no way he’d schedule her for one right now, not when she’s been acting so…different.

From "The Wrong Way Home" by Kate O’Shaughnessy