(a) Canadian see quot. 1876; (b) any tract of forested land suitable for lumbering; (c) = timberline, n.

On a mountain, the line or level above which no trees grow. Frequently with omission of the. Also attributive.

(a) the line or level on a mountain above which no trees grow (cf. snow-line, n.); (b) a row of trees; the edge of a wood.

the line beyond which trees do not grow, with reference to either altitude or latitude; cf. tree-line n. (a).