A low shoe with a thin sole.
- A machine or device for raising, compressing, or transferring fluids.
- Physiology A molecular mechanism for the active transport of ions or molecules across a cell membrane.
- Physics Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
- Informal The heart.
- To raise or cause to flow by means of a pump.
- To draw, deliver, or pour forth as if with a pump.
- To remove the water from: pump out a flooded basement.
- To cause to move with the up-and-down motion of a pump handle: a bicyclist pumping the pedals.
- To propel, eject, or insert with or as if with a pump: pumped new life into the economy.
- Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.
- Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.
- To question closely or persistently: pump a witness for secret information.
- To operate a pump.
- To raise or move gas or liquid with a pump.
- To move up and down in the manner of a pump handle.
- Sports To fake a throw, pass, or shot by moving the arm or arms without releasing the ball.
- pump up To inflate with gas by means of a pump: pump up a tire.
- pump up Slang To fill with enthusiasm, strength, and energy: The lively debate really pumped us up.
- pump up Sports To be actively involved in a bodybuilding program: athletes pumping up at the gym.
- pump iron Sports To lift weights.
- A woman's shoe that has medium or high heels and no fastenings.