Definition of martians:
(adj) :
Of or relating to the planet Mars, or (science fiction) its imagined inhabitants.
(n) :
(chiefly science fiction) An inhabitant of the planet Mars.
(adj) :
(astrology) Pertaining to the astrological influence of the planet Mars; aggressive, bellicose.
(adj) :
Pertaining to the Roman god Mars, the god of war.
(n) :
(astrology) A person under the astrological influence of the planet Mars.
(n) :
(science fiction) A hypothetical language spoken on Mars.