( of a roof, wall, etc. ) to fall down and towards the centre :
The ceiling suddenly caved in on top of them.
—related noun cave-in
( of a roof, wall, etc. ) to fall down and towards the centre :
The ceiling suddenly caved in on top of them.
—related noun cave-in
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005