tree line

American  

[tree-lahyn] / ˈtriˌlaɪn /

Or treeline

noun

1. timberline.

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tree line British  

noun

1. the zone, at high altitudes or high latitudes, beyond which no trees grow. Trees growing between the timberline and the tree line are typically stunted

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tree line Scientific  

1. See timberline

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Example Sentences

See Examples For:

tree line

One study found that the birds are forced to move higher in the mountains as their natural habitat in the alpine meadows above the tree line get crowded.

From BBC ● Oct. 6, 2026

Others caution drivers to slow for horse-drawn buggies that skirt in and out of the tree line.

From The Wall Street Journal ● Sep. 19, 2026

Her frantic run down to the tree line, which covered several miles and about 2,000 vertical feet, took at least an hour.

From Los Angeles Times ● Sep. 15, 2025

Although many of Alabama’s old-growth forests have long been cut down and replaced with trees that grow on a timeline more suitable for its logging industry, its tree line is still lush and visually impressive.

From Slate ● Aug. 31, 2025

I begin to skirt along the tree line, searching for a tree with a branch high and long enough to fit my needs.

From "Catching Fire" by Suzanne Collins

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