n. The brother of one's father or mother; also, the husband of one's aunt: correlative to aunt.n. A familiar title of address to an old man: used especially in the southern United States as a kindly title for a worthy old negro: as, “Uncle Tom's Cabin”; correlative to aunt or aunty in similar use.n. A pawnbroker: so called in humorous allusion to the financial favors often expected and sometimes received from rich uncles.n. A termination of some diminutive words of Latin origin, as homuncle (also homuncule), oratiuncle, etc.