/ Dictionary / Index P polio: Meaning and Definition of Find definitions for: po•li•o Pronunciation: (pō'lē•ō"), [key] — n. poliomyelitis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: polio (Thesaurus) policyowner polioencephalitis Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language