white line

American  

noun

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.

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white line British  

noun

1. a line or strip of white in the centre of a road to separate traffic going in different directions

2. a white lamination in the hoof of a horse

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Etymology

Origin of white line

First recorded in 1590–1600

Example Sentences

The "Bar" is a white line that marks a boundary beyond which guests may not pass when MPs are at work.

From BBC • Jan. 19, 2024

“After the click, the video display shut down with only a white line visible to crew members.”

From Seattle Times • Dec. 28, 2023

Beyond lie the turquoise and azure waters of the lagoon, a white line of surf at the reef, cumulus clouds on the horizon moving as stately as galleons.

From Slate • Aug. 5, 2023

It responded with a four-paragraph description, which included an explanation of the ethereal white line that stretched across the photo.

From New York Times • Mar. 14, 2023

His fingertips stopped just at the edge of the white line.

From "Throne of Glass" by Sarah J. Maas