/ Dictionary / Index T THz: Meaning and Definition of Find definitions for: THz Pronunciation: [key] terahertz. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thz (Thesaurus) Thyssen ti Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language