/ Dictionary / Index S surbased: Meaning and Definition of Find definitions for: sur•based Pronunciation: (sûr'bāst"), [key] — adj. Archit. having a surbase. depressed; flattened. (of an arch) having a rise of less than half the span. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. surbase surbased arch 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