A boy is a child who will grow up to be a man.

You can refer to a young man as a boy, especially when talking about relationships between boys and girls.

Someone's boy is their son.

You can refer to a man as a boy, especially when you are talking about him in an affectionate way.

You can use boy when giving instructions to a horse or dog.

The police are sometimes referred to as the boys in blue .

Some people say 'boy' or 'oh boy' in order to express feelings of excitement or admiration.

If you say boys will be boys, for example when a group of men are behaving noisily or aggressively, you are suggesting in a light-hearted way that this is typical male behaviour and will never change.

If a man is described as one of the boys, he is accepted by a group of male friends who do things that are thought of as typically masculine.