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invade

[in-veyd] /ɪnˈveɪd/
verb (used with object), invaded, invading.
1.
to enter forcefully as an enemy; go into with hostile intent:
Germany invaded Poland in 1939.
2.
to enter like an enemy:
Locusts invaded the fields.
3.
to enter as if to take possession:
to invade a neighbor's home.
4.
to enter and affect injuriously or destructively, as disease:
viruses that invade the bloodstream.
5.
to intrude upon:
to invade the privacy of a family.
6.
to encroach or infringe upon:
to invade the rights of citizens.
7.
to permeate:
The smell of baking invades the house.
8.
to penetrate; spread into or over:
The population boom has caused city dwellers to invade the suburbs.
verb (used without object), invaded, invading.
9.
to make an invasion:
troops awaiting the signal to invade.
Origin
1485-1495
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
Synonyms
1, 2. penetrate, attack.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for invader
  • The invader spreads through the host in a matter of days.
  • And by seeing how these cells act when confronted with a new invader, researchers are hoping to disarm the enemy far in advance.
  • Swarms of antibodies disable the invader, marking it for destruction by white blood cells or other immune molecules.
  • If a viable virus presents itself later, the antibodies signal immune-system cells, which engulf the invader.
  • Pop music has always been a benign invader, plundering and homogenizing wherever it treads.
  • invader responses to species richness and functional diversity treatments differed between sites.
  • The immune response to a particular invader say a virus works this way.
British Dictionary definitions for invader

invade

/ɪnˈveɪd/
verb
1.
to enter (a country, territory, etc) by military force
2.
(transitive) to occupy in large numbers; overrun; infest
3.
(transitive) to trespass or encroach upon (privacy, etc)
4.
(transitive) to enter and spread throughout, esp harmfully; pervade
5.
(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 invader
n.

1540s, agent noun from invade.

invade

v.

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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