We found 31 dictionaries that define the word mother-in-law:

General (25 matching dictionaries)

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

Business (2 matching dictionaries)

24. Bouvier's Law Dictionary 1856 Edition (No longer online)
25. Mother-in-law: Legal dictionary

Miscellaneous (2 matching dictionaries)

26. Brilliant Dream Dictionary (No longer online)
27. mother-in-law: Wordcraft Dictionary

Slang (1 matching dictionary)

28. mother-in-law: Green’s Dictionary of Slang

Sports (1 matching dictionary)

29. Hickok Sports Glossaries (No longer online)

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

Definitions from Wiktionary ( ) ▸ noun:  The mother of one's spouse. ▸ noun:  A mother-in-law apartment. ▸ noun:  A mother-in-law sandwich. ▸ noun:  (dated) A stepmother. Similar: grandmother-in-law, stepmother-in-law, mother-out-law, sister-in-law, parent-in-law, daughter-in-law, co-mother-in-law, ma-in-law, mom-in-law, mum-in-law, more... Phrases: mother-in-law plant, mother-in-law apartment, mother-in-law sandwich, mother-in-law seat, My Wife and My Mother-in-Law, more... ▸ Word origin ▸ Words similar to mother-in-law ▸ Usage examples for mother-in-law ▸ Idioms related to mother-in-law ▸ Wikipedia articles (New!) ▸ Popular adjectives describing mother-in-law ▸ Words that often appear near mother-in-law ▸ Rhymes of mother-in-law ▸ Invented words related to mother-in-law