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Meaning of white line

white' line'

Pronunciation: [key]
  1. a stripe of white paint, tiles, or the like, that marks the center or outer edge of a road.
  2. a white layer in a horse's hoof.
  3. any blank or white part, line, stripe, or margin.

white•line

Pronunciation: (hwīt'līn", wīt'-), [key]
— n. Naut.
  1. codline.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.