Source : WordNet®

AD
     adv : in the Christian era; used before dates after the supposed
           year Christ was born; "in AD 200" [syn: {A.D.}, {anno
           Domini}]

Source : Free On-Line Dictionary of Computing

AD
     
        {Administrative Domain}

ad
     
         The {country code} for Andorra.
     
        (1999-01-26)