The separation between human breasts

Cleavage is the narrow depression or hollow between the breasts of women. The superior portion of cleavage may be accentuated by clothing such as a low-cut neckline that exposes the division. Joseph Breen, head of the U.S. film industry's Production Code Administration, coined the term in its current meaning when evaluating the 1943 film The Outlaw, starring Jane Russell. The term was explained in Time magazine on August 5, 1946. It is most commonly used in the parlance of Western female fashion to refer to necklines that reveal or emphasize d├ęcolletage.