/ Dictionary / Index O Ottumwa: Meaning and Definition of Find definitions for: Ot•tum•wa Pronunciation: (u-tum'wu), [key] — n. a city in SE Iowa, on the Des Moines River. 27,381. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ottumwa (Thesaurus) ottrelite Otway Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language