n.
Pronunciation: ' p ə mp
Function: noun
Etymology: Middle English pumpe, pompe; akin to Middle Low German pumpe pump, Middle Dutch pompe
Date: 15th century
1 : a device that raises, transfers, delivers, or compresses fluids or that attenuates gases especially 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 biological mechanism by which atoms, ions, or molecules are transported across cell membranes ― compare SODIUM PUMP