[ wimp ]
/ wɪmp /

noun Informal.

a weak, ineffectual, timid person.

Verb Phrases

wimp out, Informal.
  1. to be or act like a wimp.
  2. to show timidity or cowardice; chicken out.



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Origin of wimp

An Americanism dating back to 1915–20; origin uncertain; cf. whimper

Definition for wimp (2 of 2)

[ wimp ]
/ wɪmp /


any of a group of weakly interacting elementary particles predicted by various unified field theories, as the W particle and Z-zero particle, that are characterized by relatively large masses.

Origin of WIMP

1985–90; W(eakly)I(nteracting)M(assive)P(article)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for wimp

British Dictionary definitions for wimp (1 of 2)

/ (wɪmp) /


informal a feeble ineffective personSee also wimp out

Derived forms of wimp

wimpish or wimpy, adjective

Word Origin for wimp

C20: of unknown origin

British Dictionary definitions for wimp (2 of 2)

/ (wɪmp) /

acronym for

windows, icons, menus (or mice), pointers: denoting a type of user-friendly screen display used on small computersa WIMP system
physics weakly interacting massive particle
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

Scientific definitions for wimp

[ wĭmp ]

Short for weakly interacting massive particle. Any of various hypothetical particles, some predicted by certain theories such as supersymmetry, which interact with other particles by the force of gravity alone. WIMPs are considered by some scientists to be candidates for the dark matter that makes up much of the mass of the universe.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.