A high rock or peak: also a tower, thus retaining the same meaning it had, as torr, with the Anglo-Saxons.
·noun A tower; a turret. II. Tor ·noun High-pointed hill; a rocky pinnacle. ...
Webster's Dictionary of the English Language
a high rock, as MAM-TOR, a high rock in Derbyshire. N. ...
A glossary of provincial and local words used in England by Francis Grose