/ Dictionary / Index H hydraulic pile: Meaning and Definition of Find definitions for: hydrau'lic pile' Pronunciation: [key] — Building Trades. Building Trades. a hollow pile through which a jet of water is forced to wash away the ground beneath. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydraulic motor hydraulic press Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language