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[in-veyd] /ɪnˈveɪd/
verb (used with object), invaded, invading.
to enter forcefully as an enemy; go into with hostile intent:
Germany invaded Poland in 1939.
to enter like an enemy:
Locusts invaded the fields.
to enter as if to take possession:
to invade a neighbor's home.
to enter and affect injuriously or destructively, as disease:
viruses that invade the bloodstream.
to intrude upon:
to invade the privacy of a family.
to encroach or infringe upon:
to invade the rights of citizens.
to permeate:
The smell of baking invades the house.
to penetrate; spread into or over:
The population boom has caused city dwellers to invade the suburbs.
verb (used without object), invaded, invading.
to make an invasion:
troops awaiting the signal to invade.
1485-95; < Latin invādere, equivalent to in- in-2 + vādere to go; see wade
Related forms
invadable, adjective
invader, noun
quasi-invaded, adjective
reinvade, verb (used with object), reinvaded, reinvading.
uninvadable, adjective
uninvaded, adjective
1, 2. penetrate, attack. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for invaders
  • People have the right to fight back against their invaders and their abusers.
  • Your language came from a long line of people thwacking invaders.
  • The people began to make their appearance upon the streets without fear of the invaders.
  • In the south and east it was destroyed later, but far more thoroughly, by invaders of an utterly different type.
  • The time has come to expose them for what they are: alien invaders.
  • The invaders die, and so do five of the seven mercenaries.
  • The five-story building actually has six floors, an unusual feature that made the building easy to defend against invaders.
  • Dendritic cells catch invaders and tell the immune system when and how to respond.
  • Ordinarily, the immune system identifies invaders and marks them for destruction.
  • They circulate around the body and bind to invaders such as viruses, thus disabling them.
British Dictionary definitions for invaders


to enter (a country, territory, etc) by military force
(transitive) to occupy in large numbers; overrun; infest
(transitive) to trespass or encroach upon (privacy, etc)
(transitive) to enter and spread throughout, esp harmfully; pervade
(of plants, esp weeds) to become established in (a place to which they are not native)
Derived Forms
invadable, adjective
invader, noun
Word Origin
C15: from Latin invādere, from vādere to go
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
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Word Origin and History for invaders



late 15c., from Middle French invader "to invade," and directly from Latin invadere "to go into, enter upon; assail, assault, attack" (see invasion). Related: invaded; invading.

Online Etymology Dictionary, © 2010 Douglas Harper
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