/ Dictionary / Index T theoretical: Meaning and Definition of Find definitions for: the•o•ret•i•cal Pronunciation: (thē"u-ret'i-kul), [key] — adj. of, pertaining to, or consisting in theory; not practical (distinguished from applied). existing only in theory; hypothetical. given to, forming, or dealing with theories; speculative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: theoretical (Thesaurus) theorem of the mean theoretical arithmetic Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language