/ Dictionary / Index H hydraulic coupling: Meaning and Definition of Find definitions for: hydrau'lic cou'pling. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydraulic cement hydraulic fluid Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language