tree line

noun

: timberline

Examples of tree line in a Sentence

The hikers had reached the tree line by noon.

Recent Examples on the Web

High-contrast shots, such as dark tree lines and cliffs against the rising or setting sun, also reveal strong shadow details. — Will Greenwald, PC Magazine, 17 Aug. 2026

On the side of the road in France’s wine region, as waves of firefighting planes passed over a charred forest, flames burst out at the edge of the tree line. — Shira Pinson, NBC news, 30 July 2026

Both vehicles went into a nearby ravine and the tree line, a police report said. — Emily Harter, Kansas City Star, 23 July 2026

Trips to the Grand Canyon, Zion National Park, or anywhere above the tree line in the mountains call for pants, not shorts, to protect against intense sun exposure. — Olivia Young, Travel + Leisure, 21 July 2026

Word History

First Known Use

1893, in the meaning defined above

Rhymes for tree line

• affine
• airline
• align
• aline
• assign
• baseline
• beamline
• benign
• bloodline
• bovine
• brucine
• byline

Kids Definition

tree line

noun

: timberline