cleavage
US /ˈkliː.vɪdʒ/
UK /ˈkliː.vɪdʒ/

1.
escote, hendidura
the hollow between a woman's breasts, especially as exposed by a low-cut garment.
:
•
Her dress showed a lot of cleavage.
Su vestido mostraba mucho escote.
2.
escisión, división, grieta
a division or schism, especially a split between two opposing sides.
:
•
The political party suffered a deep cleavage over the new policy.
El partido político sufrió una profunda escisión por la nueva política.