actor

As a noun actor

is a person who performs in a theatrical play or film.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between actionist and actor

is that actionist is (business|obsolete) a shareholder in a joint-stock company while actor is a person who performs in a theatrical play or film.

As nouns the difference between imposter and actor

is that imposter is someone who attempts to deceive by using an assumed name or identity or other devious disguise while actor is a person who performs in a theatrical play or film.

As nouns the difference between element and actor

is that element is element (part of a whole) while actor is a person who performs in a theatrical play or film.

As nouns the difference between actor and actoress

is that actor is a person who performs in a theatrical play or film while actoress is .

Actor is a synonym of functionary.

As nouns the difference between actor and functionary

is that actor is a person who performs in a theatrical play or film while functionary is a person employed as an official in a bureaucracy (usually corporate or governmental) who holds limited authority and primarily serves to carry out a simple function for which discretion is not required.

As nouns the difference between cinema and actor

is that cinema is cinema (the art of making films and movies) while actor is a person who performs in a theatrical play or film.

As nouns the difference between actor and reenactor

is that actor is a person who performs in a theatrical play or film while reenactor is one who reenacts.