/ Dictionary / Index T T-stop: Meaning and Definition of Find definitions for: T-stop Pronunciation: (tē'stop"), [key] — n. Photog. a camera lens aperture setting calibrated to a T number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. TSS T-stop system Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language