Definition of breast:
(n) :
either of the two fleshy organs on the front of a woman's chest, which contain the
mammary glands; also the analogous organs in men; the
chest, or front of the human thorax
"tanya's breasts grew alarmingly during pregnancy."
(v) :
to push against with the breast; to meet full on, to
oppose, to
face
"he breasted the hill and saw the town before him."