noun

• (obsolete) A father; the head of a family; the husband.
  "He but a Duke, would haue his Sonne a King, / And raiſe his iſſue like a louing Sire."
• (obsolete) A creator; a maker; an author; an originator.
  "Most musical of mourners, weep again! / Lament anew, Urania!—He died, / Who was the sire of an immortal strain, […]"
• (fantasy) The vampire who turned another person.
  "There is a toxin in a vampire’s fangs that will infect its victim when the sire drinks deeply and fully of their blood."

verb

• (transitive, of a male) To father; to beget.
  "In these travels, my father sired thirteen children in all, four boys and nine girls."
• (transitive, fantasy) To turn (another person) into a vampire.
  "“Do you think they were wannabes, then? Groupies who found a willing vamp to sire them?”"