1 N-COUNT (石头或地面的)罅隙，裂隙，裂口 A cleft in a rock or in the ground is a narrow opening in it. (石头或地面的)罅隙，裂隙，裂口

2 N-COUNT (下巴上的)凹口 A cleft in someone's chin is a line down the middle of it. (下巴上的)凹口

3 ADJ [ADJ n] (下巴)有凹口的 If someone has a cleft chin, they have a cleft in their chin. (下巴)有凹口的

4 PHRASE [verb-link PHRASE, PHRASE after verb] 左右为难的；进退维谷的 If you say that a person or organization is in a cleft stick, you mean that they are in a difficult situation which will bring them problems and harm whatever they decide to do. 左右为难的；进退维谷的 [British]

5 Cleft is a past participle of cleave.