/ Dictionary / Index T thinking: Meaning and Definition of Find definitions for: think•ing Pronunciation: (thing'king), [key] — adj. rational; reasoning: People are thinking animals. thoughtful; reflective: Any thinking person would reject that plan. —n. thought; judgment, reflection: clear thinking. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thinking (Thesaurus) Thinker, The* thinking cap Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language