From Longman Dictionary of Contemporary EnglishMarsMars /mɑːz $ mɑːrz/ noun TTSthe small red planet that is fourth in order from the Sun and is nearest the Earth → Martian the enormous volcanoes known to exist on Mars
Examples from the Corpus
Mars• Why does Mars have ancient floods, but no water on the surface today?• Even quite small bodies can penetrate the tenuous atmosphere of Mars and cause erosive explosions on its surface.• The color of Mars. 2.• In 1873, however, one was found on a trajectory that brought it in to cross the orbit of Mars.• This impact, or a later one, blasted the rock off the surface of Mars and sent it flying towards Earth.• Phil Revell boards a virtual mission to Mars for a preview flight.• Both Phobos and Deimos always keep the same side toward Mars. 