/ Dictionary / Index P phreatic: Meaning and Definition of Find definitions for: phre•at•ic Pronunciation: (frē-at'ik), [key] — adj. Geol. noting or pertaining to ground water. noting or pertaining to explosive volcanic activity involving steam derived from ground water: a phreatic explosion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phreatic (Thesaurus) phreak phreatophyte Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language