- [countable, uncountable]
the space between a woman’s breasts that can be seen above a dress that does not completely cover them （妇女穿低胸服时露出的）乳沟 She leaned forward slightly, revealing a deep cleavage. 她微微前倾，露出深深的乳沟。
- [countable] (formal)
a difference or division between people or groups （个人或集团之间的）差异，差别，分歧 a deep cleavage between rich and poor in society 社会贫富之间的深深割裂