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