IPA: /ˌpriːˈθiːətər/
KK: /priˈθiːətər/
Relating to a meal or event that takes place before attending a theater performance.
We enjoyed a pretheater dinner at a nice restaurant before the show.
Pretheater → It is formed from "pre-" (meaning before) and "theater" (from Greek "theatron", meaning a place for viewing). The word "pretheater" refers to something that occurs before a theatrical performance.
Think of 'before' ('pre-') a 'place for viewing' ('theater') — that's what pretheater means.