[pump] n [ME pumpe, pompe, fr. MLG pumpe or MD pompe, perh. fr. Sp bomba, of imit. origin] (15c) 1: a device that raises, transfers, or compresses fluids or that attenuates gases esp. by suction or pressure or both
2: heart
3: an act or the process of pumping
4: an energy source (as light) for pumping atoms or molecules
5: a mechanism (as the sodium pump) for pumping atoms, ions, or molecules
[2]pump vi (1508) 1: to work a pump: raise or move a fluid with a pump
2: to exert oneself to pump or as if to pump something
3: to move in a manner that resembles the action of a pump handle ~ vt 1 a: to raise (as water) with a pump b: to draw fluid from with a pump
2: to pour forth, deliver, or draw with or as if with a pump "~ed money into the economy" "~ new life into the classroom" 3 a: to question persistently b: to elicit by persistent questioning
4. a: to operate by manipulating a lever b: to manipulate as if operating a pump handle "~ed my hand warmly" c: to cause to move with an action resembling that of a pump handle "a runner ~ing her arms"
5: to transport (as ions) against a concentration gradient by the expenditure of energy
6. a: to excite (as atoms or molecules) esp . so as to cause emission of coherent monochromatic electromagnetic radiation (as in a laser) b: to energize (as a laser) by pumping -- pump iron : to lift weights [3]pump n [origin unknown] (1555): a shoe that grips the foot chiefly at the toe and heel; esp: a close-fitting woman's dress shoe with a moderate to high heel