[countable, uncountable]a yellow citrus fruit with a lot of sour juice. Slices of lemon and lemon juice are used in cooking and drinkslemon teaYou need a lot of lemons to make lemonade.Squeeze the juice of half a lemon over the fish.a lemon tree2[uncountable]lemon juice or a drink made from lemon3 (alsolemon yellow)[uncountable]a pale yellow color4[countable] (informal) a thing, especially a car, that is useless because it does not work as it shouldsynonymdud
