What does invader mean?
An invader is a person, group, force, or organism that enters a place or field with unwelcome or aggressive intentions. Its most familiar use refers to an army or hostile force crossing into another country to conquer or control territory, as in “the invaders approached the city.” The word can also describe a person who intrudes into an organization or a species spreading beyond its native range and displacing local organisms. Because “invader” carries a strong sense of hostility and forceful disruption, it is more than a neutral label for someone who enters a place. Figuratively, it may criticize a person who takes over a position or area of responsibility without regard for others. The word is consequently useful when discussing conflict, ecological disruption, or intrusive behavior, while conveying that the entrant is not merely visiting or settling but is threatening the existing order.
A person, group, army, or force that enters a territory with hostile or aggressive intentions, especially to conquer or control it.
"The local militia prepared to meet the invader."
Often used in military and historical contexts, with a strongly negative connotation.
A person, group, or organism that intrudes into a place or spreads into an area where it is not native.
"The invasive plant can behave like an aggressive invader in a new habitat."
The ecological sense is common, although invasive species is often the more usual term.
The regular plural is used for individual people, groups, forces, or organisms.
"The invaders fled as the storm approached."
An invader can mean an army, a troublesome alien species, or, figuratively, anyone who forcefully takes over a place or position.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does invader come from?
The word comes from Latin invadere, formed from in- meaning “into” or “upon” and vadere meaning “to go.” The Latin verb developed the sense of entering hostile territory and taking possession of it. English borrowed the related forms invade, invasion, and invasive, as well as the noun invader, from the same Latin root.
How invader is actually used
The word is strongly hostile in connotation and is commonly used for military aggression, unwelcome intrusion, or organisms that displace native species. In the figurative sense, it can describe anyone who forcefully takes over a role, position, or area of responsibility.
Easily confused with invader
An invader enters with hostile or aggressive intentions, whereas an immigrant enters a country primarily to live or work there.
An invader often implies organized or military hostility, while an intruder may simply be someone who enters property or a private space without permission.