/ Dictionary / Index A aquifer: Meaning and Definition of Find definitions for: aq•ui•fer Pronunciation: (ak'wu-fur), [key] — n. any geological formation containing or conducting ground water, esp. one that supplies the water for wells, springs, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aquifer (Thesaurus) aquiculture Aquila Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language