- light in weight.
- being lighter in weight, texture, etc., than another item or object of identical use, quality, or function: a lightweight topcoat;a lightweight alloy for ship construction.
- without seriousness of purpose; trivial or trifling: lightweight reading.
- of or relating to a lightweight: He's the new lightweight contender.
- (of a horse, especially a hunter) able to carry up to 165 pounds (75 kilograms).
- a person of less than average weight.
- a person who is of little influence, importance, or effect.
- a boxer or other contestant intermediate in weight between a featherweight, and a welterweight, especially a professional boxer weighing between 126 and 135 pounds (56.7–61 kilograms).
- of a relatively light weight
- not serious; trivial
- a person or animal of a relatively light weight
- a professional boxer weighing 130–135 pounds (59–61 kg)
- an amateur boxer weighing 57–60 kg (126–132 pounds)
- (as modifier)
- a wrestler in a similar weight category (usually 115–126 pounds (52–57 kg))
- a person of little importance or influence
