indoor soccer
noun [ U ] US uk/ɪnˌdɔː ˈsɒk.ər/ us/ɪnˌdɔːr ˈsɑː.kɚ/ (UK six-a-side football, arena football)
（六人制）室内足球
football played by two teams of six players, not the usual eleven players. The playing area is surrounded by a wall, not lines, and the game does not stop for throw-ins, corners, or goal kicks.