Source : WordNet®

download
     v : transfer a file or program from a central computer to a
         smaller computer or to a computer at a remote location
         [ant: {upload}]

Source : Free On-Line Dictionary of Computing

download
     
         To transfer data or (especially) code from one
        computer to another.  The distinction between downloading and
        uploading is hazy but downloading often refers to transfer
        from a larger "host" system (especially a {server} or
        {mainframe}) to a smaller "client" system, especially a
        {microcomputer} or specialised peripheral.
     
        Opposite: {upload}.
     
        However, note that ground-to-space communications has its own
        usage rule for this term.  Space-to-earth transmission is
        always "down" and the reverse "up" regardless of the relative
        size of the computers involved.  So far the in-space machines
        have invariably been smaller; thus the upload/download
        distinction has been reversed from its usual sense.
     
        [{Jargon File}]
     
        (1994-12-07)