/ Dictionary / Index A aerator: Meaning and Definition of Find definitions for: aer•a•tor Pronunciation: (âr'ā-tur, ā'u-rā"-), [key] — n. an apparatus for aerating water or other fluids. a device for introducing air into a bin of wheat or other grain in order to prevent the accumulation of moisture, keeping it free of fungi and insects. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aerator (Thesaurus) aerate aerenchyma Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language