theatrical

If something happens on a stage, you can describe it as theatrical. Even reading a grocery list out loud can be theatrical, if you do it in dramatic voice with an audience watching.

An actor who works on Broadway rather than in Hollywood is theatrical, and a play can be described as a theatrical production. If it happens in a theater, or is related to theater, it's theatrical. You can also use the adjective theatrical to talk about behavior that seems like it belongs on a stage, like a little boy's melodramatic weeping when he discovers a cheese sandwich in his lunch instead of peanut butter and jelly.

Definitions of theatrical

adjective
of or relating to the theater
adjective
suited to or characteristic of the stage or theater

“a theatrical pose”

“one of the most theatrical figures in public life”

Synonyms:
histrionic, melodramatic
characteristic of acting or a stage performance; often affected

showy
displaying brilliance and virtuosity

stagey, stagy
having characteristics of the stage especially an artificial and mannered quality

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Antonyms:
untheatrical
not suited to or characteristic of the stage or theater
noun
a performance of a play

synonyms: histrionics, representation, theatrical performance

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types:
matinee
a theatrical performance held during the daytime (especially in the afternoon)

type of:
performance, public presentation
a dramatic or musical entertainment