improvisational theatre

uncountable

a form of theatre in which the actors perform spontaneously, without a script

Japanese Meaning

脚本なしで俳優が即興的に演じる演劇形式

She found her confidence through improvisational theatre, where every line is created in the moment.

彼女は、すべての台詞がその場で作られる即興劇を通じて自信をつけた。

Sense（1）

a form of theatre in which the actors perform spontaneously, without a script