Thurl (?), n. [AS. yrel a hole. 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.
© Webster 1913.
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.
© Webster 1913.