A male child, from birth to the age of puberty; a lad; hence, a son.
- A male child.
- A son: his youngest boy.
- Often Offensive A man, especially a young man.
- Informal A man socializing in a group of men: a night out with the boys.
- Offensive A male servant or employee.
- Used to express mild astonishment, elation, or disgust: Oh boy—what a surprise!