2. (noun)lettuce any of various plants of the genusLactuca
3. (noun)lettuce leaves of any of various plants of Lactuca sativa
Definitions of 'lettuce'
Webster 1913 Dictionary
1. (noun)lettuce a compositeplant of the genusLactuca (L. sativa), the leaves of which are used as salad. Plants of this genusyield a milky juice, from which lactucarium is obtained. The commonest wildlettuce of the United States is L. Canadensis