We found 35 dictionaries that define the word whopper:

General (25 matching dictionaries)

1. whopper: Longman Dictionary of Contemporary English
2. whopper: Merriam-Webster
3. whopper: Oxford Learner's Dictionaries
4. whopper: American Heritage Dictionary of the English Language
5. whopper: Collins English Dictionary
6. whopper: Vocabulary.com
7. Whopper, whopper: Wordnik
8. whopper: Cambridge Advanced Learner's Dictionary
9. whopper: Wiktionary
10. whopper: Webster's New World College Dictionary, 4th Ed.
11. whopper: The Wordsmyth English Dictionary-Thesaurus
12. whopper: Infoplease Dictionary
13. whopper: Dictionary.com
14. whopper: Online Etymology Dictionary
15. whopper: Cambridge Essential American English Dictionary
16. The Whopper, Whopper (disambiguation), Whopper: Wikipedia, the Free Encyclopedia
17. Whopper: Online Plain Text English Dictionary
18. whopper: Webster's Revised Unabridged, 1913 Edition
19. whopper: Rhymezone
20. Whopper: AllWords.com Multi-Lingual Dictionary
21. whopper: FreeDictionary.org
22. whopper: Mnemonic Dictionary
23. whopper: TheFreeDictionary.com

Computing (2 matching dictionaries)

24. Whopper: Free On-line Dictionary of Computing
25. The Whopper, Whopper: Encyclopedia

Medicine (1 matching dictionary)

26. online medical dictionary (No longer online)

Science (1 matching dictionary)

27. Whopper: Botanical Name listing of Plants

Slang (5 matching dictionaries)

28. Whopper (offensive): Racial Slur Database
29. whopper: Green’s Dictionary of Slang
30. whopper: English slang and colloquialisms used in the United Kingdom
31. American-Australian Slang Dictionary (No longer online)
32. The Whopper: Urban Dictionary

Sports (1 matching dictionary)

33. Whopper: Backgammon

(Note: See whoppers as well.)

Definitions from Wiktionary ( ) ▸ noun:  (informal) Something remarkably large. ▸ noun:  (informal) An outrageous or blatant lie. Similar: whacker, honker, smasher, skelper, blockbuster, whale, monster, jumbo, mammoth, biggun, more... Opposite: morsel, tidbit, nibble Phrases: double whopper, belly whopper, Whopper Sacrifice, Willie Whopper, Homer the Whopper, more... Adjectives: real, big, such, awful, double, great, little, common, regular, jig, american Colors:     brown,     red,     green,     yellow,     white, more... ▸ Word origin ▸ Words similar to whopper ▸ Usage examples for whopper ▸ Idioms related to whopper ▸ Wikipedia articles (New!) ▸ Popular adjectives describing whopper ▸ Words that often appear near whopper ▸ Rhymes of whopper ▸ Invented words related to whopper