Meaning of CAVITY in English

CAVITY

n. (pl. -ies)

1. a hollow within a solid body.

2 a decayed part of a tooth.

Phrases and idioms:

cavity wall a wall formed from two skins of brick or blockwork with a space between.

Etymology: F cavit{eacute} or LL cavitas f. L cavus hollow

Oxford English vocab.      Оксфордский английский словарь.