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

People have described the white road markings as "optical illusions", as the white kerbs and painted white lines look similar.

From BBC

When she crosses that white line, though, she turns into a completely different person.

From BBC

An amateur cricket captain has crossed the white line and played his first matches since suffering a life-changing injury two years ago.

From BBC

The description was completely accurate, right down to the strange white line created by a satellite streaking across the heavens.

From New York Times

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