Source : WordNet®

infrastructure
     n 1: the basic structure or features of a system or organization
          [syn: {substructure}]
     2: the stock of basic facilities and capital equipment needed
        for the functioning of a country or area; "the industrial
        base of Japan" [syn: {base}]

Source : Free On-Line Dictionary of Computing

infrastructure
     
        Basic support services for computing, particularly national
        networks.
     
        See also {information superhighway}.
     
        (1995-06-27)