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Dictionary definition for: Ar
1. (n) a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth''s atmosphere
2. (n) a unit of surface area equal to 100 square meters
3. (n) a state in south central United States; one of the Confederate states during the American Civil War
WordNet 2.1 Copyright Princeton University. All rights reserved.
