- a boxer or other contestant intermediate in weight between a bantamweight and a lightweight, especially a professional boxer weighing up to 126 pounds (57 kilograms).
- an insignificant person or thing: He thinks he's a major composer, but he's just a featherweight.
- belonging to the class of featherweights, especially in boxing.
- extremely light in weight: a featherweight quilt.
- unimportant; trifling; slight.
- something very light or of little importance
- (as modifier)
- a professional boxer weighing 118–126 pounds (53.5–57 kg)
- an amateur boxer weighing 54–57 kg (119–126 pounds)
- (as modifier)
- a wrestler in a similar weight category (usually 126–139 pounds (57–63 kg))
