curtain-up

US /ˈkɜːr.tn̩ ˌʌp/
UK /ˈkɜːr.tn̩ ˌʌp/
"curtain-up" picture
1.

開演, 幕開け

the beginning of a theatrical performance

:
The audience settled down as curtain-up approached.
開演が近づくにつれて、観客は落ち着いた。
We need to be in our seats before curtain-up.
開演前に席に着く必要があります。