/ Dictionary / Index T tnpk.: Meaning and Definition of Find definitions for: tnpk. Pronunciation: [key] turnpike. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. T-note TNT Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language