a lord, master, or other person in authority. see sir.-a tittle of respect formerly used in speaking to elders and superiors, but now only in addressing a sovereign.-a father; the head of a family; the husband.-a creator; a maker; an author; an originator.-the male parent of a beast; -- applied especially to horses; as, the horse had a good sire.-to beget; to procreate; -- used of beasts, and especially of stallions.