cabbage Show phonetics noun 1 [C or U] a large round vegetable with large green, white or purple leaves, which can be eaten cooked or raw: a savoy cabbage red/white cabbage See picture . 2 [C] UK OFFENSIVE a person who has lost all their powers of thought or speech usually as the result of a serious accident or illness http://dictionary.cambridge.org/define.asp?key=10672&dict=CALD