n. 1 an unmarried man. 2 a man or woman who has taken the degree of Bachelor of Arts or Science etc. 3 hist. a young knight serving under another's banner. bachelor girl an independent unmarried young woman. bachelor's buttons any of various button-like flowers, esp. the double buttercup. bachelorhood n. bachelorship n.
[ ME & OF bacheler aspirant to knighthood, of uncert. orig. ]