alien
nounUK /ˈeɪ.li.ən/
US /ˈeɪ.li.ən/
A creature from another planet.
The movie is about a friendly alien who wants to go home.
RELATED WORDS
OTHER MEANINGS
2. A person who comes from a different country.
In the new town, she felt like an alien at first.
3. Strange and unfamiliar.
The customs of the village seemed alien to the travelers.
4. A plant or animal brought to a place where it does not naturally live.
The alien plant spread quickly and pushed out local species.