/ Dictionary / Index H hydroplaner: Meaning and Definition of Find definitions for: hy•dro•plan•er Pronunciation: (hī'dru-plā"nur), [key] — n. a person who pilots a hydroplane, esp. a professional speedboat racer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydroplane hydropneumatization Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language