We found 22 dictionaries that define the word fool's gold:

General (17 matching dictionaries)

1. fool's gold: Merriam-Webster
2. fool's gold: Oxford Learner's Dictionaries
3. fool's gold: American Heritage Dictionary of the English Language
4. fool's gold, fool's gold: Collins English Dictionary
5. fool's gold: Vocabulary.com
6. fool's gold: Wordnik
7. fool's gold: Cambridge Advanced Learner's Dictionary
8. fool's gold: Wiktionary
9. fool's gold: The Wordsmyth English Dictionary-Thesaurus
10. fool's gold: Infoplease Dictionary
11. fool's gold, fools gold: Dictionary.com
12. Fool's Gold, Fool's Gold (Aaron Carter song), Fool's Gold (Fool's Gold album), Fool's Gold (Jill Barber album), Fool's Gold (Lee Greenwood song), Fool's Gold (One Direction song), Fool's Gold (band), Fool's Gold (comics), Fool's Gold (disambiguation), Fools Gold, Fool's gold, Fools' gold, Fools gold: Wikipedia, the Free Encyclopedia
13. fool's gold: Rhymezone
14. fools gold: FreeDictionary.org
15. fool's gold: Mnemonic Dictionary
16. fool's gold, fools gold: TheFreeDictionary.com
17. Fool's gold: Phrase Finder

Business (1 matching dictionary)

18. Fool's Gold: Investopedia

Computing (1 matching dictionary)

19. Fools gold, fool's gold: Encyclopedia

Miscellaneous (1 matching dictionary)

20. Encyclopedia of Graphic Symbols (No longer online)

Science (1 matching dictionary)

21. Fool's Gold: Eric Weisstein's World of Chemistry

Slang (1 matching dictionary)

22. Fool's Gold, Fools Gold: Urban Dictionary

Definitions from Wiktionary (fool's gold) ▸ noun:  A mineral or other substance often mistaken for gold; mainly iron pyrite. ▸ noun:  (figurative) Something worthless that deceptively seems valuable. Phrases: fools gold loaf, more... ▸ Words similar to fool's gold ▸ Usage examples for fool's gold ▸ Idioms related to fool's gold ▸ Wikipedia articles (New!) ▸ Words that often appear near fool's gold ▸ Rhymes of fool's gold ▸ Invented words related to fool's gold