/ Dictionary / Index A Arkansas: Meaning and Definition of Find definitions for: Ar•kan•sas Pronunciation: (är'kun-sô" also for 2 ar-kan'zus), [key] — n. state in S central United States; 2,285,513. 53,103 sq. mi. (137,537 sq. km). Cap.: Little Rock. Abbr.: AR (for use with zip code), Ark. a river flowing E and SE from central Colorado into the Mississippi in SE Arkansas. 1450 mi. (2335 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arkansas (Thesaurus) Arkadelphia Arkansas City Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language