1. (noun)hybridization, hybridisation, crossbreeding, crossing, cross, interbreeding, hybridizing (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids Synonyms: hybridisation, crossing, crossroad, ford, crossbreed, intersection, mark, crisscross, hybrid, carrefour, crossbreeding, hybridization, crossover, crossway, hybridizing, cross, miscegenation, interbreeding, crown of thorns, crosswalk