treeline
nounUK /ˈtriːlaɪn/
US /ˈtriːlaɪn/
The line on a mountain above which trees cannot grow.
As we climbed higher, we finally reached the treeline and saw only rocks and snow ahead.
OTHER MEANINGS
2. The edge of a forest where the trees begin or end.
The hikers set up camp right at the treeline before entering the woods.
3. A line of trees planted or growing in a row, often used as a boundary or windbreak.
A tall treeline separated the farmhouse from the open fields.
4. The upper limit of tree growth in a particular region or climate.
In the Arctic, the treeline shifts northward as the climate warms.