/ Dictionary / Index A Arcadia: Meaning and Definition of Find definitions for: Ar•ca•di•a Pronunciation: (är-kā'dē-u), [key] — n. a mountainous region of ancient Greece, traditionally known for the contented pastoral innocence of its people. any real or imaginary place offering peace and simplicity. a city in SW California, E of Los Angeles. 45,994. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arcadia (Thesaurus) arcade game Arcadian Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language