IPA: /ˈθɪətə/
KK: /ˈθiːətər/
A building or place where plays, movies, or other performances are shown to an audience.
We went to the theatre to watch a new play last night.
The word 'theatre' is derived from the Greek 'theatron' (meaning a place for viewing), which comes from 'theaomai' (meaning to see or behold). The term refers to a place designed for the audience to view performances or spectacles.
Imagine a place where people go to 'see' ('theaomai') performances — that's why 'theatre' is a venue for viewing shows.