Breadcrumb Home > Dictionary Cite Meaning of slide rule Find definitions for: slide' rule" Pronunciation: [key] a device for performing mathematical calculations, consisting essentially of a ruler having a sliding piece moving along it, both marked with graduated, usually logarithmic, scales: now largely replaced by the electronic calculator. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. slider slide trombone Related Content Daily Word Quiz: recherch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language