Definition of "feather-weight" [feather-weight]

• In racing, the lightest weight allowed by the rules to be carried by a horse in a handicap. (noun)
• In sporting, a boxer, etc., whose weight falls within the lowest of the divisions prescribed by the rules —heavy-weight, middle-weight, light-weight, and feather-weight; hence, a very light weight, or a person of very light weight. (noun)
• A frivolous or flippant person; one of slight ability, influence, or importance. (noun)

The Century Dictionary (Public Domain)

• "Having aced this test three times already, the small, outboard-wheeled feather-weight did it in three runs."
• "Reading as an onlooker is such a treat and Elizabeth Baines positions the fulcrum of each story with absolute precision and then, with the most feather-weight whispers, proceeds to tip the balance of power first one way then the next."
• "McLame is not feather-weight, so I'm looking for a close Obama win tonight."