Breadcrumb Home > Dictionary > Index A Aar: Meaning and Definition of Find definitions for: Aar Pronunciation: (är), [key] — n. a river in central Switzerland, flowing N to the Rhine. 175 mi. (280 km) long. aar Pronunciation: [key] against all risks average annual rainfall. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aar (Thesaurus) A.A.P.S.S. Aarau TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: spelunk Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language