theatre
US /ˈθiː.ə.t̬ɚ/
UK /ˈθiː.ə.t̬ɚ/

1.
a building or outdoor area in which plays, shows, or other performances are given
:
•
We went to the theatre to see a play.
•
The new theatre has excellent acoustics.
2.
the art or profession of producing or performing plays
:
•
She studied theatre at university.
•
He has dedicated his life to theatre.
3.
a room or hall with tiers of seats used for lectures, demonstrations, or surgical operations
:
•
The medical students gathered in the operating theatre.
•
The professor gave a lecture in the large lecture theatre.