Thurl \Thurl\, n. [AS. [thorn]yrel a hole. [root]53. See
{Thirl}, {Thrill}.]
1. A hole; an aperture. [Obs.]
2. (Mining)
(a) A short communication between adits in a mine.
(b) A long adit in a coalpit.
Thurl \Thurl\, v. t. [See {Thrill}.]
1. To cut through; to pierce. [Obs.] --Piers Plowman.
2. (Mining) To cut through, as a partition between one
working and another.