Definition of timberline in English:

timberline

noun

North American
  • 1(on a mountain) the line or altitude above which no trees grow.

    Also called tree line
    1. 1.1 (in high northern (or southern) latitudes) the line north (or south) of which no trees grow.

Pronunciation

timberline

/ˈtɪmbərˌlaɪn//ˈtimbərˌlīn/