A cavalier is defined as a knight or a courteous gentleman.(noun)
An example of cavalier is Sir Lancelot.
The definition of cavalier is an arrogant person or someone indifferent or casual about important matters.(adjective)
An example of cavalier is someone not really caring about receiving an eviction notice.
See cavalier in Webster's New World College Dictionary
Origin: Fr < It cavaliere < LL caballarius < L caballus, horse; akin to Gr kaballēs; prob. < native name in Asia Minor
See cavalier in American Heritage Dictionary 4
Origin: French, horseman
Origin: , from Old Italian cavaliere
Origin: , from Late Latin caballārius
Origin: , from Latin caballus, horse.
Learn more about cavalier