noun
cleavage
KLEE-vihj
noun
1
The visible gap between a woman's breasts, especially when shown by a low neckline.
"The dress had a neckline that showed a hint of cleavage."
"She chose a more modest top for the interview, one without much cleavage."
2
A split or division of something into separate parts, including the natural splitting planes in crystals or the division of cells during growth.
"Geologists studied the mineral's cleavage to identify it."
"The embryo underwent several rounds of cell cleavage in the first hours after fertilization."
How to Use Cleavage
Learner’s notesIn plain EnglishMost often used for the gap shown between breasts, but the word's core meaning is simply "a splitting or division."
Common pairings
show cleavage
a hint of cleavage
cell cleavage
crystal cleavage
Word Forms
cleavages plural
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Etymology
Built from the verb "cleave" (to split) plus the noun-forming suffix "-age" — the same pattern as "breakage" from "break."