/ Dictionary / Index T thinker: Meaning and Definition of Find definitions for: think•er Pronunciation: (thing'kur), [key] — n. a person who thinks, as in a specified way or manner: a slow thinker. a person who has a well-developed faculty for thinking, as a philosopher, theorist, or scholar: the great thinkers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thinker (Thesaurus) thinkable Thinker, The* Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language