IPA: /ˈæktər/
KK: /ˈæktər/
A person who performs in plays, movies, or television shows, usually by portraying a character.
The actor delivered an outstanding performance in the film.
Actor → It is formed from "agere" (meaning to do or to act) and the suffix "-or" (meaning one who). An actor is one who does or performs, particularly in a theatrical context.
Think of someone who 'does' ('agere') something on stage — that's why an actor is someone who performs.