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- DictionaryPump/pəmp/
noun
- 1. a mechanical device using suction or pressure to raise or move liquids, compress gases, or force air into inflatable objects such as tires: "a gas pump"
- 2. an active transport mechanism in living cells by which specific ions are moved through the cell membrane against a concentration gradient: "the bacterium's sodium pump"
verb
- 1. force (liquid, gas, etc.) to move by or as if by means of a pump: "the blood is pumped around the body"
- 2. draw (milk) from the breast using a breast pump, typically in order to feed a baby by means of a bottle: "she struggled with pumping enough milk"