noun

1. a small, egg-shaped, edible citrus fruit with a yellow rind and a juicy, sour pulp, rich in ascorbic acid
2. the small, spiny, semitropical evergreen citrus tree (Citrus limon) bearing this fruit
3. pale yellow
4. ☆ Slang
   1. something, esp. a manufactured article, that is defective or imperfect
   2. an inadequate person

Etymology: ME lymon < MFr limon < Ar laimūn < Pers līmūn

adjective

1. having the color of a lemon; pale to bright yellow
2. made with or from lemons
3. having a flavor more or less like that of lemons