LIGHTWEIGHT

lightweight

(adjective) weighing relatively little compared with another item or object of similar use; “a lightweight fabric”; “lightweight wood”

lightweight

(adjective) having no importance or influence; “a lightweight intellect”

lightweight

(noun) a professional boxer who weighs between 131 and 135 pounds

lightweight

(noun) a wrestler who weighs 139-154 pounds

lightweight

(noun) an amateur boxer who weighs no more than 132 pounds

whippersnapper, jackanapes, lightweight

(noun) someone who is unimportant but cheeky and presumptuous

Source: WordNet® 3.1

Etymology

Noun

lightweight (plural lightweights)

(combat sports) A particular weight class, or member of such, as prescribed by the rules, between that of the heavier welterweight and the lighter featherweight. See Wikipedia for the specifics of each sport.

(rowing) A particular weight category as prescribed by the rules, separate from an open or heavyweight class.

(weightlifting) A competitive weight division as prescribed by the rules, between the heavier middleweight and the lighter featherweight.

One of little consequence or ability.

A person who cannot handle their drink; one who gets drunk on very little alcohol.

(by extension) A person with low endurance.

A political candidate with little chance of winning

Adjective

lightweight (comparative more lightweight, superlative most lightweight)

Lacking in earnestness, ability, or profundity

Having less than average weight

Lacking in strength

(computing) Having a small footprint or performance impact

Source: Wiktionary

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.]

Light"weight`, a.

Definition: Light in weight, as a coin; specif., applied to a man or animal who is a lightweight.

Source: Webster’s Unabridged Dictionary 1913 Edition