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.
Bayard, Don Quixote, Gawain, Lancelot, Ritter, Sidney, Sir Galahad, baccalaureate, baccalaureus, bach, banneret, baronet, caballero, cavalier, chevalier, companion, confirmed bachelor
, degree, doctor, doctorate, knight, knight bachelor
, knight banneret, knight baronet, knight-errant, master, old bach, single man
celibacy, singleness, single blessedness, bachelorhood, bachelorship, misogamy, misogyny, virginity, pucelage, maidenhood, maidenhead, unmarried man, bachelor
, Coelebs, agamist, old bachelor
, misogamist, misogynist, monogamist, monk, unmarried woman, spinster, maid, maiden, virgin, feme sole, old maid, bachelor
, nun, unmarried, unwed, unwedded, wifeless, spouseless, single.