If a roof or ceiling falls in, it collapses and falls to the ground.
Part of my bedroom ceiling has fallen in.
= cave in
PHRASAL VERB: V P
If a roof or ceiling falls in, it collapses and falls to the ground.
Part of my bedroom ceiling has fallen in.
= cave in
PHRASAL VERB: V P
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012