[ ˌkavə'lɪə ]
■ noun
1》 ( Cavalier ) historical a supporter of King Charles I in the English Civil War.
2》 archaic or literary a courteous gentleman.
3》 archaic a cavalryman.
■ adjective showing a lack of proper concern.
Derivatives
~ly adverb
Origin
C16: from Fr., from Ital. ~e , based on L. caballus 'horse'.