Usually means: Spouse's brother or sibling's spouse.
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We found 26 dictionaries that define the word brother in law:

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

Business (2 matching dictionaries)
  1. Bouvier's Law Dictionary 1856 Edition (No longer online)
  2. Brother-in-law, Brother in law: Legal dictionary

Slang (1 matching dictionary)
  1. brother-in-law: Urban Dictionary

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Definitions from Wiktionary (Brother in law)

▸ noun:  Alternative form of brother-in-law [A male relative of one's generation, separated by one degree of marriage:]

Similar:
sib-in-law, sonlaw, boy-friend, broh, double-uncle, broskie, guy-friend, brosef, exboyfriend, friend boy, more...

Adjectives:
grand, aval, grandfatherly, poppy, gammy, pappy, avunculate, granny, sib, novercal, grandpaternal



▸ Words similar to brother in law

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▸ Rhymes of brother in law

▸ Invented words related to brother in law

Similar:
sib-in-law, sonlaw, boy-friend, broh, double-uncle, broskie, guy-friend, brosef, exboyfriend, friend boy, more...

Adjectives:
grand, aval, grandfatherly, poppy, gammy, pappy, avunculate, granny, sib, novercal, grandpaternal



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