We found 27 dictionaries that define the word father-in-law:

General (23 matching dictionaries)

1. father-in-law: Merriam-Webster
2. father-in-law: Oxford Learner's Dictionaries
3. father-in-law: American Heritage Dictionary of the English Language
4. father-in-law, father-in-law: Collins English Dictionary
5. father-in-law: Vocabulary.com
6. father-in-law: Wordnik
7. father-in-law: Cambridge Advanced Learner's Dictionary
8. father-in-law: Wiktionary
9. father-in-law: Webster's New World College Dictionary, 4th Ed.
10. father-in-law: Infoplease Dictionary
11. Father-in-law, father-in-law: Dictionary.com
12. father-in-law: Cambridge Essential American English Dictionary
13. Father-in-law: Wikipedia, the Free Encyclopedia
14. Father-in-law: Online Plain Text English Dictionary
15. father-in-law: Webster's Revised Unabridged, 1913 Edition
16. father-in-law: Rhymezone
17. father-in-law: AllWords.com Multi-Lingual Dictionary
18. father-in-law: Webster's 1828 Dictionary
19. father-in-law: FreeDictionary.org
20. father-in-law: Mnemonic Dictionary
21. father-in-law: TheFreeDictionary.com

Business (1 matching dictionary)

22. Bouvier's Law Dictionary 1856 Edition (No longer online)

Medicine (1 matching dictionary)

23. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

24. Brilliant Dream Dictionary (No longer online)

Slang (1 matching dictionary)

25. father-in-law: Urban Dictionary

(Note: See father-in-laws as well.)

Definitions from Wiktionary ( ) ▸ noun:  One's spouse's father. ▸ noun:  (dated) A stepfather. Similar: father in law, parent-in-law, grandfather-in-law, eldfather, great-grandfather-in-law, stepfather-in-law, uncle-in-law, co-father-in-law, mother-in-law, father-out-law, more... Opposite: mother-in-law, in-law ▸ Words similar to father-in-law ▸ Usage examples for father-in-law ▸ Idioms related to father-in-law ▸ Wikipedia articles (New!) ▸ Popular adjectives describing father-in-law ▸ Words that often appear near father-in-law ▸ Rhymes of father-in-law ▸ Invented words related to father-in-law