To draw, as a liquid, by the action of the mouth and tongue, which tends to produce a vacuum, and causes the liquid to rush in by atmospheric pressure; to draw, or apply force to, by exhausting the air.
To draw liquid from by the action of the mouth; as, to suck an orange; specifically, to draw milk from (the mother, the breast, etc.) with the mouth; as, the young of an animal sucks the mother, or dam; an infant sucks the breast.
To draw in, or imbibe, by any process resembles sucking; to inhale; to absorb; as, to suck in air; the roots of plants suck water from the ground.
To draw or drain.