Idioms

    prime the pump,
    1. to increase government expenditure in an effort to stimulate the economy.
    2. to support or promote the operation or improvement of something.
    pump iron. iron(def 29).

Origin of pump

1
1400–50; late Middle English pumpe (noun); cognate with German Pumpe, Dutch pomp
Related forms

Definition for pump (2 of 2)

pump

2
[ puhmp ]
/ pʌmp /

noun

a lightweight, low-cut shoe without fastenings for women.
a slip-on black patent leather shoe for men, for wear with formal dress.

Origin of pump

2
First recorded in 1720–30; origin uncertain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pump

British Dictionary definitions for pump (1 of 2)

pump

1
/ (pʌmp) /

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
biology a mechanism for the active transport of ions, such as protons, calcium ions, and sodium ions, across cell membranesa sodium pump

verb

Word Origin for pump

C15: from Middle Dutch pumpe pipe, probably from Spanish bomba, of imitative origin

British Dictionary definitions for pump (2 of 2)

pump

2
/ (pʌmp) /

noun

a low-cut low-heeled shoe without fastenings, worn esp for dancing
a type of shoe with a rubber sole, used in games such as tennis; plimsoll

Word Origin for pump

C16: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for pump

pump

[ pŭmp ]

n.

A machine or device for raising, compressing, or transferring fluids.
A molecular mechanism for the active transport of ions or molecules across a cell membrane.

v.

To raise or cause to flow by means of a pump.
To transport ions or molecules against a concentration gradient by the expenditure of chemically stored energy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for pump

pump

[ pŭmp ]

A device used to raise or transfer fluids. Most pumps function either by compression or suction.
A molecular mechanism for the active transport of ions or molecules across a cell membrane.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.