What is the meaning of Cavalier?

Not caring enough about something important.

High-spirited.

Supercilious.

Of or pertaining to the party of King Charles I of England (1600–1649).

A military man serving on horse, early modern cavalry officers who had abandoned the heavy armor of medieval knights.

A gallant: a sprightly young dashing military man.

A gentleman of the class of such officers, particularly:

  1. A courtesan or noble under Charles I of England, particularly a royalist partisan during the English Civil War which ended his reign.

    A courtesan or noble under Charles I of England, particularly a royalist partisan during the English Civil War which ended his reign.

    Someone with an uncircumcised penis.

    A defensive work rising from a bastion, etc., and overlooking the surrounding area.

    Of a man: to act in a gallant and dashing manner toward (women).

    horseman, particularly:

    1. knight
    2. cavalier: an early modern cavalry officer
    3. (horse-)rider

    knight

    cavalier: an early modern cavalry officer

    (horse-)rider

    knight

    knight (in tarot)

    U-nail, fence staple, construction staple

    cable clip

    (male) partner

    (male) date, (male) companion for social activities

    equestrian

    cavalier (all senses)

    Source: wiktionary.org