ˈbox ˌoffice BrE AmE noun
1 . [countable] the place in a theatre, cinema etc where tickets are sold ⇨ ticket office
at the box office
Collect your tickets at the box office.
2 . [singular] used to describe how successful a film, play, or actor is, by the number of people who pay to see them
a (huge) box office hit/success
a (big) box office draw (=a successful actor who many people will pay to see)
box office receipts/takings etc (=the number of tickets sold or the money received)