Meaning of white belt

white' belt'

Pronunciation: [key]
— Martial Arts. Martial Arts.
  1. a white cloth waistband worn by a beginner in one of the martial arts, as judo or karate.
  2. a beginner or novice in one of the martial arts.
  3. the rank of beginner. Cf.(def. 3),
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.