acting has definitions from the field of theater
1
[ noun ] (theater) the performance of a part or role in a drama

Used in print

(The Christian Science Monitor,...)

Thereafter the audience waxed applause happy , but discriminating operagoers reserved judgment as her singing showed signs of strain , her musicianship some questionable procedure and her acting uncomfortable stylization .

(The Providence Journal...)

Charlotte_Fairchild was excellent as the loyal Marie , who became the second Mrs._LaGuardia , singing and acting with remarkable conviction .

I must say , however , that I preferred the acting that had something of a biting edge to it .

(David Stacton, The Judges of the Secret Court....)

Acting soothed him .

2
[ adjective ] serving temporarily especially as a substitute

Examples

"the acting president"

Used in print

("Editorials"...)

The appointment of U_Thant of Burma as the U.N.'s Acting Secretary_General - at this writing , the choice appears to be certain - offers further proof that in politics it is more important to have no influential enemies than to have influential friends .

Related terms

impermanent

*