Here you will find one or more explanations in English for the word LIGHTWEIGHT.
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Lightweight
Lightweight Light"weight`, n.
One of less than average weight; specif.:
(a) In boxing, wrestling, etc., one weighingnot more than 133
pounds (U. S. amateur rules 135 pounds, Eng. 140 pounds).
(b) A person of small impotance or mental ability. [Colloq.,
Chiefly U. S.]
Lightweight
Lightweight Light"weight`, a.
Light in weight, as a coin; specif., applied to a man or
animal who is a lightweight.
Meaning of LIGHTWEIGHT from wikipedia