Definition of "bachelor"

bachelor

/ˈbæt͡ʃ.ə.lə(ɹ)/

noun
plural bachelors
1. A person, especially a man, who is socially regarded as able to marry, but has not yet.
  Quotations
  As merry and mellow an old bachelor as ever followed a hound.
  1824, Geoffrey Crayon [pseudonym; Washington Irving], Tales of a Traveller, (please specify |part=1 to 4), Philadelphia, Pa.: H[enry] C[harles] Carey & I[saac] Lea, […]
  I shall die a bachelor.
  1933, S. N. Behrman, Queen Christina
2. The first or lowest academical degree conferred by universities and colleges; a bachelor's degree.
3. Someone who has achieved a bachelor's degree.
4. (Canada) A bachelor apartment.
5. (obsolete) An unmarried woman.
  Quotations
  A bachelor still, by keeping of your portion :And keep you not alone without a husband
  1632 (first performance), Benjamin Jonson [i.e., Ben Jonson], “The Magnetick Lady: Or, Humors Reconcil’d. A Comedy […]”, in The Workes of Benjamin Jonson. The Second Volume. […] (Second Folio), London: […] Richard Meighen, published 1640
6. (obsolete) A knight who had no standard of his own, but fought under the standard of another in the field.
7. (obsolete) Among London tradesmen, a junior member not yet admitted to wear the livery.
8. A kind of bass, an edible freshwater fish (Pomoxis annularis) of the southern United States.