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.]
© Webster 1913
Light"weight`, a.
Light in weight, as a coin; specif., applied to a man or animal who is a lightweight.
© Webster 1913