Noun | 1.tower cress - or genus Arabis: erect cress widely distributed throughout EuropeArabis glabra, tower mustard, Turritis glabracress, cress plant - any of various plants of the family Cruciferae with edible leaves that have a pungent tastegenus Turritis, Turritis - closely related to and often included in genus Arabis | | 2. tower cress - European cress having stiff erect stems; sometimes placed in genus TurritisArabis turrita, tower mustardArabis, genus Arabis - annual to perennial woody herbs of temperate North America, Europe and Asia: rockcressrock cress, rockcress - any of several rock-loving cresses of the genus Arabis |