- Noun. An edible plant, ''Lactuca sativa'' and its close relatives, having a head of green and/or purple leaves.
- Noun. (uncountable) The leaves of the lettuce plant, eaten as a vegetable; as a dish often mixed with other ingredients, dressing etc.
- Noun. (uncountable, US) : Folding money, also called cabbage, due to the green color of both US currency and the vegetables.