DictionaryinvadeMilitary entry
verb

invade

in-VAYD/ɪnˈveɪd/

To enter another's territory with hostile forces.

The hostile intruder invades the home through its broken door.

An aggressive intruder strides over a freshly broken, fallen apartment door into an occupied home while the resident retreats with hands raised defensively.
Etymology

The pieces express “go into,” but the Latin compound already included entering violently or as an enemy. The selected English meaning carries that hostile force, not merely movement into a place.

In context

TED-Ed0:40
When foreign microbes invade us, the immune system triggers a series of responses
How do vaccines work? - Kelwalin Dhanasarnsombut

More examples

  • Enemy troops invaded the island before dawn.
  • The government fears that foreign forces will invade.
  • The invading army meets fierce resistance at the border.

Forms

invade · invades · invaded · invading

invasion noun — An armed entry into another territory.

invader noun — A soldier who enters territory to attack.

Similar words

attack
Attack means using force, without necessarily entering enemy territory.
conquer
Conquer emphasizes defeating opponents and taking control of territory.
occupy
Occupy means holding territory, often after an invasion.