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noun Common

alien

AY-lee-uhn

Alien (noun) means a being from another planet. Example: “The movie is about aliens invading Earth.”

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noun
1
A being from another planet.
"The movie is about aliens invading Earth."
2
A foreign citizen living in a country where they do not hold citizenship.
"She had to renew her resident alien status every few years."
adj
1
Very strange or unfamiliar.
"The customs of the new country felt completely alien to him at first."
verb
1
(formal, law) To transfer ownership of property to someone else.
"The estate could not alien the land without the trustee's consent."

How to use alien

Learner’s notes

In plain EnglishA being from outer space, a foreign non-citizen, or (as an adjective) something unfamiliar and strange.

Common pairings
illegal alien alien invasion feel alien to
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Word forms

Singular
aliens
Plural
aliens
Past tense
aliened
Comparative
more alien
Superlative
most alien
Test yourself on “alien” A quick quiz — meaning, synonyms & usage

Fill the gap

Can you complete this real example?

The movie is about _____ invading Earth.

Etymology

From Latin alienus ("belonging to another"), from alius ("other") — related to English "else".

Origin: Latin

Related words

Rhymes for alien

See all rhymes for alien →

Frequently asked questions

What does “alien” mean?

The word “alien” means a being from another planet. In plain terms, a being from outer space, a foreign non-citizen, or (as an adjective) something unfamiliar and strange.

How do you pronounce “alien”?

“Alien” is pronounced AY-lee-uhn (/ˈeɪ.li.ən/ in IPA).

How do you use “alien” in a sentence?

Here is “alien” used in a sentence: “The movie is about aliens invading Earth.”

What is another word for “alien”?

Words with a similar meaning to “alien” include outlander.

What part of speech is “alien”?

Depending on how it is used, “alien” can be a noun, an adjective and a verb.

Where does the word “alien” come from?

The word “alien” comes from Latin. From Latin alienus ("belonging to another"), from alius ("other") — related to English "else".

Is “alien” a common word?

“Alien” is a fairly common word in modern English.

How many meanings does “alien” have?

“Alien” has 4 distinct senses listed in this dictionary. The most common is: a being from another planet.

What is the difference between an alien and an immigrant?

In its legal sense, an 'alien' is simply a foreign citizen living in a country where they do not hold citizenship, a formal or bureaucratic label. 'Immigrant' describes a person who has come to settle in a new country, and is the more everyday, neutral word most people use.

What is the difference between 'alien' as a noun and as an adjective?

As a noun, 'alien' names a being from another planet or a foreign non-citizen. As an adjective it means strange, unfamiliar, or foreign, as in 'an alien landscape' or 'ideas alien to our culture'.

What words commonly go with 'alien'?

Common pairings include 'alien life', 'alien invasion', and 'illegal alien' in legal or immigration contexts. As an adjective you often hear 'alien concept', 'alien environment', and 'utterly alien'.

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