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Mars noun

Click to hear the UK pronunciation of this wordClick to hear the US pronunciation of this word/mɑːz//mɑːrz/ n [S]

Definition

the planet fourth in order of distance from the Sun, after the Earth and before Jupiter
Mars is sometimes called the Red Planet because of its distinctive colour.
So is there life on Mars?

Martian adjective

Click to hear the UK pronunciation of this wordClick to hear the US pronunciation of this word/ˈmɑː.ʃən//ˈmɑːr-/ adj

(Definition of Mars noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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