Sc. rare–1. Meaning uncertain; perhaps ‘hollow tree’: Jamieson suggests that Hogg may have meant BOUR TREE; on which conjecture the word has since been given in dictionaries and books on botany as an actual name of the Elder.
1818. Hogg, Brownie, I. 216. Round the hillock, on the lea, Round the auld borral tree, Or bourock by the burn-side.
