break off phr v 1 [T] to remove a piece from the main part of something 折断〔某物〕: She broke off a piece of cheese. 她掰下一片乳酪。 2 [T] to end a relationship 断绝〔关系〕: The US has broken off diplomatic relations with Iran. 美国中断了与伊朗的外交关系。 3 [I,T] to suddenly stop doing something or talking to someone （使）突然结束; 中断谈话