Source : Webster's Revised Unabridged Dictionary (1913)

Ar \Ar\, conj.
   Ere; before. [Obs.] --Chaucer.

Source : WordNet®

Ar
     n 1: a colorless and odorless inert gas; one of the six inert
          gases; comprises approximately 1% of the earth's
          atmosphere [syn: {argon}, {atomic number 18}]
     2: a unit of surface area equal to 100 square meters [syn: {are}]
     3: a state in south central United States; one of the
        Confederate states during the American Civil War [syn: {Arkansas},
         {Land of Opportunity}]

Source : Free On-Line Dictionary of Computing

ar
     
         The {country code} for Argentina.
     
        (1999-01-27)