uncle

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The brother of one's mother or father.
2. n. The husband of one's aunt.
3. n. Used as a form of address for an older man, especially by children.
4. n. A kindly counselor.
5. n. Slang A pawnbroker.
6. n. Uncle Sam.
7. idiom. cry Informal To indicate a willingness to give up a fight or surrender: tickled my brother until he cried uncle.

Century Dictionary and Cyclopedia

1. n. The brother of one's father or mother; also, the husband of one's aunt: correlative to aunt.
2. 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.
3. n. A pawnbroker: so called in humorous allusion to the financial favors often expected and sometimes received from rich uncles.
4. n. A termination of some diminutive words of Latin origin, as homuncle (also homuncule), oratiuncle, etc.

Wiktionary

1. n. A brother or brother-in-law of someone’s parent.
2. n. euphemistic A companion to your (usually unmarried) mother.
3. n. figuratively A source of advice, encouragement, or help.
4. n. UK, informal A pawnbroker.
5. n. colloquial A close male friend of the parents of a family.
6. n. southern US, slang, archaic an older male African-American person
7. n. India, slang An affectionate name for an older man.
8. interj. A cry used to indicate surrender.

GNU Webster's 1913

1. n. The brother of one's father or mother; also applied to an aunt's husband; -- the correlative of aunt in sex, and of nephew and niece in relationship.
2. n. Slang A pawnbroker.
3. n. colloq. An eldery man; -- used chiefly as a kindly or familiar appellation, esp. (Southern U. S.) for a worthy old negro.”

WordNet 3.0

1. n. the brother of your father or mother; the husband of your aunt
2. n. a source of help and advice and encouragement