cavalier

adjective5

1. •
   Lacking the proper care or concern for something important, reckless, rash, high-handed.

   • But, on the following day, no sign of Poirot. I was getting angry. He was really treating us in the most cavalier fashion. — 1920
2. •
   Free and easy; unconcerned with formalities
3. •
   (historical) Of or pertaining to the party of King Charles I of England (1600–1649).
4. •
   Supercilious.
5. •
   High-spirited.

noun5

1. •
   (historical) A military man serving on horse, (chiefly) early modern cavalry officers who had abandoned the heavy armor of medieval knights.
2. •
   (historical) A gentleman of the class of such officers.
3. •
   (historical) A gallant: a sprightly young dashing military man.
4. •
   A defensive work rising from a bastion, etc., and overlooking the surrounding area.
5. •
   (slang) Someone with an uncircumcised penis.

   • The roundheads in the school showers easily equalled the cavaliers. — 1992

verb1

1. •
   (old-fashioned) Of a man: to act in a gallant and dashing manner toward (women).

   • His social and kind nature is inferred from his cavaliering the ladies Percy and Mortimer, and introducing them, before their husbands depart for the war. — 1863

noun3

1. •
   (historical) A royalist partisan of Charles I of England during the English Civil War, especially from the upper classes.
2. •
   A Cavalier King Charles Spaniel.
3. •
   A Chevrolet Cavalier.