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lightweight

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A lightweight is defined as a person or thing that is below normal weight, or is a person that is not important, or a boxing category between featherweight and heavyweight or a boxer who falls within this category.

(noun)

A person who weighs only 90 pounds is an example of a lightweight.
A boxing category for amateur boxers between 125 and 135 pounds is an example of lightweight.
A person in politics who actually has very little political influence is an example of a lightweight.

The definition of lightweight is something below normal weight, or is something that has little serious value.

(adjective)

A jacket of thin material is an example of something that would be described as lightweight.
A newspaper with little substance or actual news is an example of something that would be described as lightweight.

See lightweight in Webster's New World College Dictionary

noun

one below normal weight
a boxer between a junior lightweight and a junior welterweight, with a maximum weight of 135 pounds (61.24 kg)
☆ Informal a person of limited influence, intelligence, or competence

adjective

light in weight
of lightweights
not serious

See lightweight in American Heritage Dictionary 4

noun

One that weighs relatively little or less than average.
a. A weight division in professional boxing having an upper limit of 135 pounds (60.7 kilograms), between junior lightweight and junior welterweight.
b. A boxer competing in this weight division.
c. A similar weight division in other sports, such as weightlifting.
d. A contestant in this weight division.
A person of little ability, intelligence, influence, or importance.

adjective

Weighing relatively little; not heavy: lightweight clothing; a lightweight wood.
Sports Of, relating to, or characteristic of a lightweight: the lightweight title.
Having no significance or influence: a lightweight intellect.

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