A lemon is a bright yellow fruit with very sour juice. Lemons grow on trees in warm countries.

Lemon is a drink that tastes of lemons.

Lemon is the same as lemon yellow .

If you think that something is a failure, or not as good or as useful as it should be, you can say that it is a lemon .

If you think that someone looks foolish because they are shy or slow to take action, you can say that they are like a lemon .