What is the meaning of Cleavage?

The act of cleaving or the state of being cleft.

The hollow or separation between a woman's breasts, especially as revealed by a low neckline.

Any similar separation between two body parts, such as the buttocks or toes.

The repeated division of a cell into daughter cells after mitosis.

(chemistry) The splitting of a large molecule into smaller ones.

The tendency of a crystal to split along specific planes.

The division of voters into voting blocs.

Source: wiktionary.org