1. To cause to flow by means of a pump or pumplike organ or device: Derricks pumped oil out of the ground. The heart pumps blood throughout the body.
2. To draw, deliver, or pour forth: a writer who pumped out a new novel every year.
3. To propel, eject, or insert: pumped new life into the economy.
4. To cause to move with an up-and-down or back-and-forth motion: a bicyclist pumping the pedals; a piston pumping a shaft.
5. To push or pull (a brake or lever, for instance) rapidly: a driver pumping the brakes.
6. To shoot (bullets, for example) at or into: a gunner pumping rounds at a target.
7. Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.
8. Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.
9. To invest (money) repeatedly or persistently in something.
10. To question closely or persistently: pump a witness for secret information.
11. Informal To promote or publicize vigorously: The company pumped its new product on its website.
1. To cause to flow by means of a pump or pumplike organ or device: Derricks pumped oil out of the ground. The heart pumps blood throughout the body.2. To draw, deliver, or pour forth: a writer who pumped out a new novel every year.3. To propel, eject, or insert: pumped new life into the economy.4. To cause to move with an up-and-down or back-and-forth motion: a bicyclist pumping the pedals; a piston pumping a shaft.5. To push or pull (a brake or lever, for instance) rapidly: a driver pumping the brakes.6. To shoot (bullets, for example) at or into: a gunner pumping rounds at a target.7. Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.8. Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.9. To invest (money) repeatedly or persistently in something.10. To question closely or persistently: pump a witness for secret information.11. Informal To promote or publicize vigorously: The company pumped its new product on its website.
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