- a boxer or other contestant intermediate in weight between a bantamweight and a lightweight, especially a professional boxer weighing up to 126 pounds (57 kg).
- an insignificant person or thing: He thinks he's a major composer, but he's just a featherweight.
- belonging to the class of featherweights, especially in boxing.
- extremely light in weight: a featherweight quilt.
- unimportant; trifling; slight.
Origin of featherweight
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for featherweight
With the featherweight the swing is very liable to get out of gear.The Complete Golfer 
Some canoeists take with them a suit of featherweight oilskin.Packing and Portaging
That was not a difficult feat since she was but a featherweight.The Phantom Town Mystery
I am not as strong as I once was so I bought a featherweight one.The Modern Pistol and How to Shoot It
Adams laughed, took the thing up with one hand, and raised it to his shoulder as though it had been a featherweight.The Pools of Silence
H. de Vere Stacpoole
- something very light or of little importance
- (as modifier)featherweight considerations
- a professional boxer weighing 118–126 pounds (53.5–57 kg)
- an amateur boxer weighing 54–57 kg (119–126 pounds)
- (as modifier)the featherweight challenger
- a wrestler in a similar weight category (usually 126–139 pounds (57–63 kg))
Word Origin and History for featherweight
Online Etymology Dictionary, © 2010 Douglas Harper