1. (n.) A tree of several species, constituting the genus Betula; as, the white or common birch (B. alba) (also called silver birch and lady birch); the dwarf birch (B. glandulosa); the paper or canoe birch (B. papyracea); the yellow birch (B. lutea); the black or cherry birch (B. lenta).

2. (n.) The wood or timber of the birch.

3. (n.) A birch twig or birch twigs, used for flogging.

4. (n.) A birch-bark canoe.

5. (a.) of or pertaining to the birch; birchen.

6. (v. t.) To whip with a birch rod or twig; to flog.

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