We found 24 dictionaries that define the word top dog:

General (20 matching dictionaries)

1. top dog: Longman Dictionary of Contemporary English
2. top dog: Merriam-Webster
3. top dog: Oxford Learner's Dictionaries
4. top dog: American Heritage Dictionary of the English Language
5. top dog: Collins English Dictionary
6. top dog: Vocabulary.com
7. top-dog: Wordnik
8. top dog: Cambridge Advanced Learner's Dictionary
9. top dog: Wiktionary
10. top dog: The Wordsmyth English Dictionary-Thesaurus
11. top dog: Infoplease Dictionary
12. top-dog, top dog: Dictionary.com
13. The Top Dog, Top Dog (comic book character), Top Dog (comics), Top Dog (rapper), Top Dog: Wikipedia, the Free Encyclopedia
14. top dog: Rhymezone
15. top dog: FreeDictionary.org
16. top dog: Mnemonic Dictionary
17. top-dog, top dog: TheFreeDictionary.com
18. Top dog: World Wide Words

Computing (1 matching dictionary)

19. top dog: Encyclopedia

Miscellaneous (1 matching dictionary)

20. the top dog: Idioms

Slang (2 matching dictionaries)

21. top dog: English slang and colloquialisms used in the United Kingdom
22. top dog: Urban Dictionary

(Note: See top_dogs as well.)

Definitions from Wiktionary (top dog) ▸ noun:  (idiomatic) The boss, the leader (of the pack). ▸ noun:  (idiomatic) In a competition, the one expected to win. Similar: head, chief, top cat, top banana, grandboss, leader, superboss, alpha dog, boss, supremo, more... Opposite: underdog, subordinate, inferior, second fiddle Types: alpha, beta, gamma, delta, epsilon, more... Phrases: America's Top Dog, more... Adjectives: dog, doggy, doggy style, cat, doggystyle, pet, puppyish, catty, kindle, void, dog-eat-dog ▸ Words similar to top dog ▸ Usage examples for top dog ▸ Idioms related to top dog ▸ Wikipedia articles (New!) ▸ Words that often appear near top dog ▸ Rhymes of top dog ▸ Invented words related to top dog