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Meaning of white-knuckle

white-knuckle

Pronunciation: (hwīt'nuk'ul, wīt'-), [key]
— adj. Informal.
  1. causing fear, apprehension, or panic: The plane made a white-knuckle approach to the fogged-in airport.
  2. experiencing fear, terror, or apprehension: The white-knuckle crowd loved that director's newest horror movie.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.