Definition of timberline
: the upper limit of arboreal growth in mountains or high latitudes —called also tree line
Recent Examples of timberline from the Web
The weather service says above timberline, the powerful winds are likely to produce whiteout conditions and dangerously cold wind chills.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'timberline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of timberline
TIMBERLINE Defined for English Language Learners
Definition of timberline for English Language Learners
: an imaginary line on a mountain or high area of land that marks the level above which trees do not grow
TIMBERLINE Defined for Kids
Definition of timberline for Students
: the upper limit beyond which trees do not grow (as on mountains)
Seen and Heard
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