/ Dictionary / Index A alleviator: Meaning and Definition of Find definitions for: al•le•vi•a•tor Pronunciation: (u-lē'vē-ā"tur), [key] — n. a person or thing that alleviates. (in a pipeline) an airtight box, having a free liquid surface, for cushioning the shock of water hammer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alleviator (Thesaurus) alleviative all-expense 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