Real Dictionary

pump
countable noun: A pump is a machine or device that is used to force a liquid or gas to flow in a particular direction.

pump in American English 1
any of various machines that force a liquid or gas into or through, or draw it out of, something, as by suction or pressure
to raise or move (fluids) with a pump
to work a pump
noun: an apparatus or machine for raising, driving, exhausting, or compressing fluids or gases by means of a piston, plunger, or set of rotating vanes

pump in American English 2
a low-cut shoe without straps or ties; esp., such a woman's shoe with a moderate to high heel
noun: a lightweight, low-cut shoe without fastenings for women

pump in British English 1
noun: any device for compressing, driving, raising, or reducing the pressure of a fluid, esp by means of a piston or set of rotating impellers

pump in British English 2
noun: a low-cut low-heeled shoe without fastenings, worn esp for dancing

pump in Chemical Engineering
noun: A pump is a device used for moving a liquid.

pump in Mechanical Engineering
noun: A pump is a device used for moving a liquid.