Oxford Advanced American Dictionary

Definition of lemon noun from the Oxford Advanced Learner's Dictionary

Oxford3000

lemon

noun
lemon pronunciation English ˈlemən lemon pronunciation American ˈlemən
 
1 [countable, uncountable] a yellow citrus fruit with a lot of sour juice. Slices of lemon and lemon juice are used in cooking and drinkslemon teaa gin and tonic with ice and lemonSqueeze the juice of half a lemon over the fish.a lemon tree2 [uncountable] lemon juice or a drink made from lemon see also bitter lemon3 (also lemon yellow) [uncountable] a pale yellow colour4 [countable] (informal, especially North American English) a thing that is useless because it does not work as it should
Synonym
dud
5 [countable] (British English) a stupid person