noun
- a person or group that enters a place by force in order to take control of it
- something that enters and spreads harmfully in a place where it does not belong
Examples
- The ancient city fell to foreign invaders after a long siege.
- Roman invaders conquered much of Europe and Britain.
- The castle’s defenders fought bravely against the invaders.
- Invasive plant species are considered biological invaders.
- The computer virus acted like an invader, spreading through the network.
- Local wildlife struggled to compete with the new invaders.