(bûrch) verb, transitive. birched, birching, birches. noun. 1. Any of various deciduous trees or shrubs of the genus Betula, native to the Northern Hemisphere and having unisexual flowers in catkins, alternate, simple, toothed leaves, and bark that often peels in thin papery layers, pokok birch; 2. (wood) kayu birch; transitive verb. menyebat dengan kayu.