Breadcrumb Home > Dictionary > Index T thinking cap: Meaning and Definition of Find definitions for: think'ing cap" Pronunciation: [key] a state of mind marked by reflection or concentration: If we put on our thinking caps, we may come up with the answer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thinking think piece TrendingHere are the facts and trivia that people are buzzing about. Did Birds Evolve from Dinosaurs? The Twelve Dancing Princesses Current Events This Week: January 2023 African Americans by the Numbers Andersen's Fairy Tales: Contents The Celtic Twilight: A Teller of Tales ✖ Related Content Daily Word Quiz: saturnine Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language