present participle of mar: ruining, thwarting, spoiling.

Something that mars or spoils; a blemish.

(steel-making) Relating to the production of martensite grains in steel.

to spoil or damage the look or quality of something

A city, the county seat of Plymouth County, Iowa, United States.

A bright, somewhat yellowish brown.

the symbol ♂

(astrology) A purported statistical correlation between a person's athletic success and the position of the planet Mars relative to the horizon at the time and place of their birth.

Any of a number of small unmanned remote-controlled vehicles sent to the planet Mars to do scientific research.

An exploration mission to Mars launched in 2003 by the European Space Agency; consisted of the Mars Express Orbiter and the Beagle 2 lander.