From Longman Dictionary of Contemporary Englishshowtimeshow‧time /ˈʃəʊtaɪm $ ˈʃoʊ-/ noun [uncountable] 1 the time that a play or film will begin in a theatre or cinema2 American English informal the time when an activity should begin
Examples from the Corpus
showtime• The Boston show was canceled 10 minutes before showtime because Kelly was ill.• Student rush tickets are available 15 minutes before showtime.• It's five minutes to showtime and a huge roar goes up as Ice-T announces the acts.ShowtimeShowtime a cable television channel in the US which shows films and other programmes 