/ Dictionary / Index S standard gauge: Meaning and Definition of Find definitions for: stand'ard gauge". Pronunciation: [key] See under(def. 13). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. standard error standardize Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language