tor

Meanings

1. A craggy outcrop of rock on the summit of a hill, created by the erosion and weathering of rock.
2. A hill with such rock formation.

1. Alternative form of tore ("hard, difficult; strong; rich").

1. Initialism of terms of reference.
2. Initialism of transcript of records, an official record of a student's or graduate's academic achievements at the college or university level, including all courses taken, grades earned, and credits.

1. Abbreviation of Toronto.

1. Abbreviation of The Onion Routing, an implementation of second-generation onion routing.

1. Abbreviation of Toronto.

1. Initialism of transcript of records.
2. Initialism of terms of reference.
3. Symbol for tons of refrigeration.

Etymology

From Middle English tor, torr-, from Old English torr, tor (“a high rock, lofty hill, tower”), possibly from Proto-Celtic, compare Old Welsh *tor (“hill”); ultimately from Latin turris (“tower”), from Ancient Greek τύρρις (túrrhis), τύρσις (túrsis, “tower”), of non-Indo-European origin. Cognate with Cornish tor, Scottish Gaelic tòrr, Welsh twr, Irish tor, French tor, and Romansh tor/tur/tuor; the first four are Celtic (from Latin turris), the last two directly from Latin turris (from Ancient Greek τύρρις (túrrhis) and τύρσις (túrsis)). It is not clear whether the Celtic forms were borrowed from Old English or vice versa. Doublet of tourelle, tower, and turret.