/ Dictionary / Index T tectonic: Meaning and Definition of Find definitions for: tec•ton•ic Pronunciation: (tek-ton'ik), [key] — adj. of or pertaining to building or construction; constructive; architectural. tectonic valleys. pertaining to the structure of the earth's crust. referring to the forces or conditions within the earth that cause movements of the crust. designating the results of such movements:tectonic valleys. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tectonic (Thesaurus) tectiform tectonics Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language