Source : WordNet®

downtown
     adj : of or located in the lower part of a town, or in the
           business center; "downtown Manhattan"; "delinquents
           roaming the downtown streets" [ant: {uptown}]
     n : the commercial center of a town or city [syn: {business
         district}]

downtown
     adv : toward or in the lower or central part of town [ant: {uptown}]