/ Dictionary / Index H hydrator: Meaning and Definition of Find definitions for: hy•dra•tor Pronunciation: (hī'drā-tur), [key] — n. something that hydrates. a compartment or drawer, as in a refrigerator, for keeping perishable foods fresh and preventing moisture loss. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydration number hydraul. Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language