We found 28 dictionaries that define the word father in law:

General (24 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, 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, 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
22. father in law: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

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

Medicine (1 matching dictionary)

24. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

25. Brilliant Dream Dictionary (No longer online)

Slang (1 matching dictionary)

26. father-in-law, father in law: Urban Dictionary

Definitions from Wiktionary (Father in law) ▸ noun:  Alternative spelling of father-in-law [One's spouse's father.] Similar: soninlaw, grand-daddy, grandaddy, daddikins, baby father, ex wife, grampappy, dadda, grannie, grandmama, more... ▸ Words similar to father in law ▸ Usage examples for father in law ▸ Idioms related to father in law ▸ Wikipedia articles (New!) ▸ Words that often appear near father in law ▸ Rhymes of father in law ▸ Invented words related to father in law