Definition of Martian in English:


Syllabification: Mar·tian
Pronunciation: /ˈmärSHən


  • Of or relating to the planet Mars or its supposed inhabitants.
    More example sentences
    • The impact of the much larger Martian oscillations on the planet's climate is thought to be even more significant.
    • Engineers have proposed passing Martian atmosphere through zeolite crystals.
    • Carbon dioxide could be taken directly from the Martian atmosphere.


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  • A hypothetical or fictional inhabitant of Mars.
    More example sentences
    • April brings an invasion from the skies - aliens, UFOs and Martians.
    • There are good Martians and there are bad Martians.
    • Nonetheless, curious reports of canals, faces and sculptures have helped to foster a belief in Martians for many years.


late Middle English (in the senses 'subject to Mars's influence' and 'martial'): from Latin Mars, Mart- (see Mars) + -ian.

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space