ar meaning and definition

AR noun

Definition of Ar (noun)

1. 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
2. a unit of surface area equal to 100 square meters
   • synonyms: are
3. a state in south central United States; one of the Confederate states during the American Civil War
   • synonyms: Arkansas, Land of Opportunity