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Martian

American  
[mahr-shuhn] / ˈmɑr ʃən /

adjective

  1. of, relating to, or like the planet Mars or its hypothetical inhabitants.


noun

  • Martians
    plural
  1. a supposed inhabitant of the planet Mars.

    The science-fiction novel was about the invasion of our planet by Martians.

Martian British  
/ ˈmɑːʃən /

adjective

  1. of, occurring on, or relating to the planet Mars

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. an inhabitant of Mars, esp in science fiction

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of Martian

1350–1400; Middle English marcien < Latin Mārti ( us ) of, belonging to Mars ( see March) + -an

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

NASA's Curiosity rover has encountered an extraordinary landscape while climbing through a Martian valley nicknamed "Valle Grande."

From Science Daily Aug. 1, 2026

"Imagine you're a Martian, you're just about to invade Earth, you're hiding in the moon... and suddenly you meet the martial music of the bagpipe."

From BBC Jul. 30, 2026

That distance was too great for the instrument to detect gamma rays coming from the planet, but scientists believed it might still register neutrons escaping from the Martian surface and atmosphere.

From Science Daily Jul. 28, 2026

After "Saving Private Ryan," "The Martian" and "Interstellar," many jokes have also been made about Damon once again starring in a film in which his character struggles to get home.

From Barron's Jul. 26, 2026

Thomas knew enough about science to realize that a Martian invasion couldn’t be true.

From "Spooked!" by Gail Jarrow

Spotted in July 2024, the reddish mudstone contains organic compounds and other minerals that could have supported bygone microbial Martians.

From The Wall Street Journal Apr. 23, 2026

Quirk was always a few covers away: The Day The Martians Landed, screamed one headline, with two alien spaceships looming dramatically; or ESP: Fact Or Fiction, as part of a series of "eternal controversies".

From BBC Dec. 27, 2023

Belief in Martians sprang in large part from a wealthy amateur astronomer, Percival Lowell, who built the observatory that still bears his name.

From Scientific American Aug. 25, 2023

Why it was thought sane to invest a reported $100 million in such an odd and particular sensibility is a question even Martians might ponder.

From Los Angeles Times May 19, 2023

The Martians stared back up at them for a long, long silent time from the rippling water....

From "The Martian Chronicles" by Ray Bradbury

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