[ verb out-kraws, -kros; noun out-kraws, -kros ]
/ verb ˌaʊtˈkrɔs, -ˈkrɒs; noun ˈaʊtˌkrɔs, -ˌkrɒs /

verb (used with object)

to cross (animals or plants) by breeding individuals of different strains but, usually, of the same breed.
to produce (a hybrid) by this method.


a hybrid animal or plant so produced.
an act of outcrossing.

Origin of outcross

First recorded in 1885–90; out- + cross
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for outcross


verb (ˌaʊtˈkrɒs)

to breed (animals or plants of the same breed but different strains)

noun (ˈaʊtˌkrɒs)

an animal or plant produced as a result of outcrossing
an act of outcrossing
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