1 (a) [C] any of various types of vegetable with green or purple leaves, usu forming a round head 洋白菜, 卷心菜, 包心菜（结球甘蓝的通称）. =>illus 见插图.
(b) [U] these leaves (usu cooked and) eaten as food 洋白菜（通常指熟的）.
2 [C] (Brit infml 口)
(a) dull inactive person without interests or ambition 无精打彩或无进取心的人.
(b) person who has lost his mental faculties, eg because of brain damage or illness, and is completely dependent on others 丧失智力的人.
1400-1500; Language: French;Origin:
] [U and C]
a large round vegetable with thick green or purple leaves[C]BrE informal
someone who cannot think, move, speak etc as a result of brain injury
1. This cabbage soup is tasty. 这种白菜汤味道好。
2. She was cubing garlic and slicing cabbage into small pieces and chatting at the same time about Auntie Suyuan: 她正在把大蒜切成小方块，把卷心菜切成小片片，同时也闲聊有关素媛姨妈的事：