[yoo-nan-uh-muh s]
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Origin of unanimous

1615–25; < Latin ūnanim(us) (ūn(us) one + animus mind, heart, feeling) + -ous
Related formsu·nan·i·mous·ly, adverbu·nan·i·mous·ness, nounnon·u·nan·i·mous, adjectivenon·u·nan·i·mous·ly, adverbnon·u·nan·i·mous·ness, nounqua·si-u·nan·i·mous, adjectivequa·si-u·nan·i·mous·ly, adverb
Can be confusedanomalous anonymous euonymus unanimous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for unanimous


  1. in complete or absolute agreement
  2. characterized by complete agreementa unanimous decision
Derived Formsunanimously, adverbunanimity (ˌjuːnəˈnɪmɪtɪ) or unanimousness, noun

Word Origin for unanimous

C17: from Latin ūnanimus from ūnus one + animus mind
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unanimous

1610s, from Latin unanimus "of one mind," from unus "one" (see one) + animus "mind" (see animus). Related: Unanimously.

Online Etymology Dictionary, © 2010 Douglas Harper