pump

(pŭmp)

1. A machine or device for raising, compressing, or transferring fluids.
2. Physiology A molecular mechanism for the active transport of ions or molecules across a cell membrane.
3. Physics Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
4. Informal The heart.

1. To raise or cause to flow by means of a pump.
2. To draw, deliver, or pour forth as if with a pump.
3. To remove the water from: pump out a flooded basement.
4. To cause to move with the up-and-down motion of a pump handle: a bicyclist pumping the pedals.
5. To propel, eject, or insert with or as if with a pump: pumped new life into the economy.
6. Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.
7. Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.
8. To question closely or persistently: pump a witness for secret information.

1. To operate a pump.
2. To raise or move gas or liquid with a pump.
3. To move up and down in the manner of a pump handle.
4. Sports To fake a throw, pass, or shot by moving the arm or arms without releasing the ball.

Related Forms:

• pumpˈer noun

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pump¹

top: jet pump

bottom: centrifugal pump

(pŭmp)