/ Dictionary / Index I interbreed: Meaning and Definition of Find definitions for: in•ter•breed Pronunciation: (in"tur-brēd'), [key] — v., -bred, -breed•ing. —v.t. to crossbreed (a plant or animal). to cause to breed together. —v.i. to crossbreed. to breed or mate with a closely related individual, as in a small, closed population. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: interbreed (Thesaurus) interbrain intercalary Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language