1. (noun)argon, Ar, atomic number 18 a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere Synonyms: argon, atomic number 18, are
2. (noun)are, ar a unit of surface area equal to 100 square meters Synonyms: argon, atomic number 18, are, ar
3. (noun)Arkansas, Land of Opportunity, AR a state in south central United States; one of the Confederate states during the American Civil War Synonyms: argon, atomic number 18, are
Synonyms and Antonyms of ar 
