We found 30 dictionaries that define the word Uncle Sam:

General (24 matching dictionaries)

1. uncle sam: Longman Dictionary of Contemporary English
2. Uncle Sam, Uncle Sam: Merriam-Webster
3. Uncle Sam: Oxford Learner's Dictionaries
4. Uncle Sam: American Heritage Dictionary of the English Language
5. Uncle Sam: Collins English Dictionary
6. Uncle Sam: Vocabulary.com
7. Uncle Sam: Wordnik
8. Uncle Sam, Uncle sam: Cambridge Advanced Learner's Dictionary
9. Uncle Sam: Wiktionary
10. Uncle Sam: The Wordsmyth English Dictionary-Thesaurus
11. Uncle Sam: Infoplease Dictionary
12. Uncle Sam: Dictionary.com
13. Uncle Sam: Online Etymology Dictionary
14. Uncle Sam (Vertigo), Uncle Sam (album), Uncle Sam (comics), Uncle Sam (diamond), Uncle Sam (disambiguation), Uncle Sam (film), Uncle Sam (singer), Uncle Sam (song), Uncle Sam, Uncle sam: Wikipedia, the Free Encyclopedia
15. Uncle sam: Rhymezone
16. UNCLE SAM: Dictionary of Americanisms (1848)
17. Uncle Sam: E Cobham Brewer, The Reader's Handbook
18. Uncle Sam: Dictionary of Phrase and Fable (1898)
19. uncle sam: FreeDictionary.org
20. uncle sam: Mnemonic Dictionary
21. Uncle Sam: TheFreeDictionary.com
22. Uncle Sam: Who2

Business (1 matching dictionary)

23. Uncle Sam: Investopedia

Computing (1 matching dictionary)

24. Uncle Sam: Encyclopedia

Miscellaneous (2 matching dictionaries)

25. Uncle Sam: Idioms
26. Uncle Sam: Wordcraft Dictionary

Slang (2 matching dictionaries)

27. uncle sam, Uncle Sam, Uncle Sam: Green’s Dictionary of Slang
28. The Uncle Sam, Uncle Sam: Urban Dictionary

(Note: See uncle_sams as well.)

Definitions from Wiktionary (Uncle Sam) ▸ noun:  (colloquial, originally US) A personification of the United States federal government or (rare) citizens. Similar: federal, federal official, T-man, government man, sovereign citizen, senate, officialdom, Caesar, Marshal, chief, more... Phrases: Uncle Sam billboard, gave to uncle sam, more... Adjectives: pa, ba, pap, gammy, pappy, avuncular, daddy, ma, mom, granny, mum ▸ Word origin ▸ Words similar to Uncle Sam ▸ Usage examples for Uncle Sam ▸ Idioms related to Uncle Sam ▸ Wikipedia articles (New!) ▸ Words that often appear near Uncle Sam ▸ Rhymes of Uncle Sam ▸ Invented words related to Uncle Sam