/ Dictionary / Index T torr: Meaning and Definition of Find definitions for: torr Pronunciation: (tôr), [key] — n. a unit of pressure, being the pressure necessary to support a column of mercury one millimeter high at 0°C and standard gravity, equal to 1333.2 microbars. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: torr (Thesaurus) torque wrench Torralba Related Content Daily Word Quiz: abdicate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language