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tree line

tree line

9 5.1
The highest level on a mountain or near the poles where trees stop growing
  • noun
  • /tri laɪn/
translation icon : línea de árboles
  • The tree line marks the elevation above which trees cannot survive due to the cold climate.
  • just below the tree line
  • ridge above the tree line
  • reaches the tree line

Examples

  • What nobody talks about here is the irrefutable fact that we are at an altitude of 12,800 feet which means we are above the natural tree line.

  • When the sun falls behind the tree line, I predict it will become very dark, very quickly.

  • We need to get below tree line before dark.

  • We can make it if we head to the tree line.

  • We need to get to the tree line.

  • Best place to go is out of the wind, over by the tree line.

  • Once he made the main road, he would follow it just inside the tree line.

    Fiction book (1995)
  • I'm standing at the tree line looking into the woods, not seeing a thing.

    Fiction book (1994)
  • The ruins are all below the tree line and don't stick up out of the forest.

    Fiction book (1999)
  • Abruptly on leaving the hut, we found ourselves above the tree line.

    Fiction book (1999)

Synonyms

timberline
vstree line
1 7.2

A line on a mountain or in cold regions that marks the highest place trees can grow

is phrased as the boundary above which trees cannot grow due to harsh conditions
treeline
vstree line
  • Specialized
1 4.0

The highest or most northern place where trees grow

is described as the limit above which trees fail to grow from severe climate
timber line
vstree line
  • Specialized
6.3

A high place on a mountain above which trees cannot grow because it is too cold

is defined as the boundary marking where growth stops because conditions are harsh

Surface Forms

tree line singular
tree lines plural

Morphology

tree + line

The meaning is directly derivable from combining 'tree' (the vegetation) with 'line' (a boundary or dividing mark): it denotes the boundary above which trees do not grow. This compound sense (treeline/timberline) is compositional and cross-linguistically common, so a B1 learner who knows both constituents should be able to infer the meaning.

Etymology

Tree line comes from the clear edge you see on mountains where the tall trees stop and form a visible line against rock or snow. So tree line now means the point or height above which trees cannot grow, the place where the forest ends.