/ Dictionary / Index P perforation gauge: Meaning and Definition of Find definitions for: perfora'tion gauge" Pronunciation: [key] — Philately. Philately. a marked ruler used to measure the number of perforations per unit length along the borders of a stamp. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perforation perforce Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language