snow line

American  

noun

1. the line, as on mountains, above which there is perpetual snow.

2. the latitudinal line marking the limit of the fall of snow at sea level.

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snow line British  

noun

1. the altitudinal or latitudinal limit of permanent snow

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snow line Scientific  

1. The boundary marking the lowest altitude at which a given area, such as the top of a mountain, is always covered with snow.

2. The boundary marking the furthest extent around the polar regions at which there is snow cover. The polar snow lines vary with the seasons.

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Etymology

Origin of snow line

First recorded in 1825–35

Example Sentences

See Examples For:

snow line

Saturn orbits beyond what astronomers call the "snow line" in the solar system, along with other giant planets that host icy moons, including Jupiter, Uranus, and Neptune.

From Science Daily ● Nov. 18, 2025

The snow line is expected to drop from around 6,000 feet Tuesday to 4,000 feet Wednesday.

From Seattle Times ● Nov. 20, 2023

With warmer air moving into California, the snow line will be much higher than in previous storms the past few weeks — as high as 8,000 to 10,000 feet.

From Washington Post ● Mar. 9, 2023

The snow line in Lake Arrowhead will stay low, at around 3,500 to 4,000 feet, on Tuesday but could dip even lower to around 2,500 feet toward the tail end of the storm on Wednesday.

From Los Angeles Times ● Feb. 27, 2023

After three or four miles I came to the snow line and there ex-changed crampons for skis.

From "Into the Wild" by Jon Krakauer