/ Dictionary / Index P picture tube: Meaning and Definition of Find definitions for: pic'ture tube" Pronunciation: [key] a cathode-ray tube with a screen at one end on which televised images are reproduced. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. picturesque picture window Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language