1 [C] an opening; an empty space in sth solid 洞: The pavement is full of holes. 人行道上到处都是窟窿。There are holes in my socks. 我的袜子上有几个洞。I've got a hole in my tooth. 我的牙上有个洞。

2 [C] the place where an animal lives in the ground or in a tree （动物的）巢穴: a mouse hole 老鼠洞

3 [C] (in golf) the hole in the ground that you must hit the ball into. Each section of the land where you play(golf course)is also called a hole. （高尔夫球）球洞，球穴区: an eighteen-hole golf course 十八个洞的高尔夫球场

4 [sing] (informal 非正式) a small dark and unpleasant room, flat, etc 阴暗狭小的房间等: This place is a hole -- you can't live here! 这地方太糟了─你不能住在这儿！