What does "sire" mean?

Sire: A tittle of respect formerly used in speaking to elders and superiors, but now only in addressing a sovereign.

Additional senses

  1. 2.A father; the head of a family; the husband. Jankin thet was our sire [i.e., husband]. Chaucer. And raise his issue, like a loving sire. Shak.
  2. 3.A creator; a maker; an author; an originator. [He] was the sire of an immortal strain. Shelley.
  3. 4.The male parent of a beast; -- applied especially to horses; as, the horse had a good sire. Note: Sire is often used in composition; as in grandsire, grandfather; great-grandsire, great-grandfather.
  4. 5.To beget; to procreate; -- used of beasts, and especially of stallions.

Sources