- Rom. Myth. the god of war; identified with the Greek Ares
- a personification of war
- the seventh largest planet of the solar system and the fourth in distance from the sun: diameter, c. 6,790 km (c. 4,220 mi); period of revolution, 1.88 earth years; period of rotation, 24.62 hours; two satellites; symbol, ?
Origin of MarsClassical Latin