A supporter of King Charles I in the English Civil War; a Royalist. The cavalier fought bravely for the king during the English Civil War.
A horseman, especially a mounted soldier; a knight. The cavalier rode through the village, his armor gleaming in the sunlight.
A gallant or chivalrous man, especially one serving as a lady's escort. He was known as a cavalier, always ready to assist and escort the ladies at the ball.
A small spaniel of the breed Cavalier King Charles Spaniel. Their family keeps two cavaliers that happily greet every visitor.