We found 28 dictionaries that define the word billy goat:

General (22 matching dictionaries)

1. billy goat: Merriam-Webster
2. billy goat: Oxford Learner's Dictionaries
3. billy goat: American Heritage Dictionary of the English Language
4. billy goat: Collins English Dictionary
5. billy goat: Vocabulary.com
6. Billy-goat, billy-goat, billy goat: Wordnik
7. billy goat: Cambridge Advanced Learner's Dictionary
8. billy-goat, billy goat: Wiktionary
9. billy goat: The Wordsmyth English Dictionary-Thesaurus
10. billy goat: Infoplease Dictionary
11. Billy goat, billy goat: Dictionary.com
12. Billy Goat (band), Billy-goat, Billy goat (disambiguation): Wikipedia, the Free Encyclopedia
13. billy goat: Rhymezone
14. Billy goat: AllWords.com Multi-Lingual Dictionary
15. billy goat: FreeDictionary.org
16. billy goat: Mnemonic Dictionary
17. billy-goat, billy goat: TheFreeDictionary.com
18. Billy goat: Wikipedia, the Free Encyclopedia
19. Billy goat: Online Plain Text English Dictionary
20. billy goat: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

21. billy goat: Encyclopedia

Medicine (2 matching dictionaries)

22. online medical dictionary (No longer online)
23. billy goat: Medical dictionary

Slang (3 matching dictionaries)

24. billy goat: Green’s Dictionary of Slang
25. Billy Goat: Urban Dictionary
26. billy goat: English slang and colloquialisms used in the United Kingdom

(Note: See billy_goats as well.)

Definitions from Wiktionary (billy goat) ▸ noun:  (childish) A male goat. Similar: he-goat, billy, billy-goat, billygoat, goatling, goatrel, goat, baa-lamb, son of a motherless goat, goatfucker, more... Phrases: Curse of the Billy Goat, Billy Goat Tavern, Billy Goat Trail, more... Adjectives: kipper, pet, broad, bairnly, lickle, la, reborn, dolly, bully, nebbie, diddy ▸ Words similar to billy goat ▸ Usage examples for billy goat ▸ Idioms related to billy goat ▸ Wikipedia articles (New!) ▸ Words that often appear near billy goat ▸ Rhymes of billy goat ▸ Invented words related to billy goat