1. related by birth; of the same parentage, descent, etc.
  2. Linguistics. descended from the same language or form: such cognate languages as French and Spanish.
  3. allied or similar in nature or quality.
  1. a person or thing cognate with another.
  2. a cognate word: The English word cold is a cognate of German kalt.

Origin of cognate

1635–45; < Latin cognātus, equivalent to co- co- + -gnātus (past participle of gnāscī, nāscī to be born)
Related formscog·nate·ness, nouncog·nat·ic [kog-nat-ik] /kɒgˈnæt ɪk/, adjectivenon·cog·nate, adjective, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cognatic

Historical Examples of cognatic

British Dictionary definitions for cognatic


  1. akin; relatedcognate languages
  2. related by blood or descended from a common maternal ancestorCompare agnate
  3. cognate object grammar a noun functioning as the object of a verb to which it is etymologically related, as in think a thought or sing a song
  1. something that is cognate with something else
Derived Formscognately, adverbcognateness, nouncognation, noun

Word Origin for cognate

C17: from Latin cognātus, from co- same + gnātus born, variant of nātus, past participle of nāscī to be born
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 cognatic



1640s, from Latin cognatus "of common descent," from com- "together" (see co-) + gnatus, past participle of gnasci, older form of nasci "to be born" (see genus). Words that are cognates are cousins, not siblings. As a noun, from 1754.

Online Etymology Dictionary, © 2010 Douglas Harper