/ Dictionary / Index I Itasca: Meaning and Definition of Find definitions for: I•tas•ca Pronunciation: (ī-tas'ku), [key] — n. a lake in N Minnesota: one of the sources of the Mississippi River. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Itapetininga ITC Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language