wheatgrass Syllabification: (wheat·grass)Pronunciation: /ˈ(h)wētˌgras/Definition of wheatgrass noun 1any of various creeping grasses, especially couch grass. 2the young shoots of the wheat plant Triticum aestivum, preparations of which are credited with various health-giving properties. wheatgrass in other Oxford dictionaries Definition of wheatgrass in the British & World English dictionary