/ Dictionary / Index T theoretician: Meaning and Definition of Find definitions for: the•o•re•ti•cian Pronunciation: (thē"ur-i-tish'un, thēr"i-), [key] — n. a person who deals with or is expert in the theoretical side of a subject: a military theoretician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: theoretician (Thesaurus) theoretical arithmetic theoretics Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language