verb in·vade \in-ˈvād\

: to enter (a place, such as a foreign country) in order to take control by military force

: to enter (a place) in large numbers

: to enter or be in (a place where you are not wanted)


Full Definition of INVADE

transitive verb
:  to enter for conquest or plunder
:  to encroach upon :  infringe
a :  to spread over or into as if invading :  permeate <doubts invade his mind>
b :  to affect injuriously and progressively <gangrene invades healthy tissue>
in·vad·er noun

Examples of INVADE

  1. The troops invaded at dawn.
  2. When tourists invade, the town is a very different place.
  3. The cancer eventually invaded the brain.
  4. Weeds had invaded the garden.
  5. Bacteria invaded and caused an infection.

Origin of INVADE

Middle English, from Latin invadere, from in- + vadere to go — more at wade
First Known Use: 15th century

Synonym Discussion of INVADE

trespass, encroach, infringe, invade mean to make inroads upon the property, territory, or rights of another. trespass implies an unwarranted or unlawful intrusion <hunters trespassing on farmland>. encroach suggests gradual or stealthy entrance upon another's territory or usurpation of another's rights or possessions <the encroaching settlers displacing the native peoples>. infringe implies an encroachment clearly violating a right or prerogative <infringing a copyright>. invade implies a hostile and injurious entry into the territory or sphere of another <accused of invading their privacy>.
INVADER Defined for Kids


verb in·vade \in-ˈvād\

Definition of INVADE for Kids

:  to enter by force to conquer or plunder
:  to show lack of respect for <She invaded their privacy.>
in·vad·er noun
Medical Dictionary


transitive verb in·vade \in-ˈvād\

Medical Definition of INVADE

:  to enter and spread within either normally (as in development) or abnormally (as in infection) often with harmful effects <protect the body from invading viruses> <branches of a nerve invade the skin area>
:  to affect injuriously and progressively <gangrene invades healthy tissue>
in·vad·er \-ˈvād-ər\ noun


Next Word in the Dictionary: invaginatePrevious Word in the Dictionary: invadableAll Words Near: invade
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