bachelor

noun9

1. •
   an adult man, or less often a woman, who has not married so far

   • As merry and mellow an old bachelor as ever followed a hound. — 1824
2. •
   A male animal without a mate during breeding season.
3. •
   The first or lowest academic degree conferred by colleges and universities; a bachelor's degree.
4. •
   Someone who has achieved a bachelor's degree.
5. •
   (Canada) A bachelor apartment.
6. •
   A kind of bass, an edible freshwater fish (Pomoxis annularis) of the southern United States.
7. •
   (no longer used) An unmarried woman.

   • A bachelor still, by keeping of your portion : And keep you not alone without a husband — 1632
8. •
   (no longer used) A knight who had no standard of his own but fought under the standard of another in the field.
9. •
   (no longer used) Among London tradesmen, a junior member not yet admitted to wear the livery.