featherweight

UK: /ˈfɛðə^rweɪt/ US: (feᵺ′ər wāt′)

WordReference Random House Unabridged Dictionary of American English © 2025

feath•er•weight  (feᵺ′ər wāt′), n. 

1. a boxer or other contestant intermediate in weight between a bantamweight and a lightweight, esp. a professional boxer weighing up to 126 lb. (57 kg).
2. an insignificant person or thing:
   He thinks he's a major composer, but he's just a featherweight.

adj. 

3. belonging to the class of featherweights, esp. in boxing.
4. extremely light in weight:
   a featherweight quilt.
5. unimportant;
   trifling;
   slight.

• feather + weight 1805–15

Collins Concise English Dictionary © HarperCollins Publishers::

featherweight / ˈfɛðəˌweɪt/ noun

1. something very light or of little importance
2. (as modifier): featherweight considerations
3. a professional boxer weighing 118–126 pounds (53.5–57 kg)
4. an amateur boxer weighing 54–57 kg (119–126 pounds)