cultivarPronunciation: /ˈkʌltɪvɑː/Definition of cultivar noun Botany a plant variety that has been produced in cultivation by selective breeding. Cultivars are usually designated in the style Taxus baccata ‘Variegata’. See also variety (sense 2).Origin: 1920s: blend of cultivate and varietycultivar in other Oxford dictionaries Definition of cultivar in the US English dictionary