Source : WordNet®

word processor
     n : an application that provides the user with tools needed to
         write and edit and format text and to send it to a
         printer [syn: {word processing system}]

Source : Free On-Line Dictionary of Computing

word processor
     
         A program used to create and print (chiefly
        textual) documents that might otherwise be prepared on a
        typewriter.  The key advantage of word processor is its
        ability to make changes easily, such as correcting spelling,
        changing margins, or adding, deleting, and relocating entire
        blocks of text.  Once created, the document can be printed
        quickly and accurately and saved for later modifications.
     
        Today most popular word processors, such as {Microsoft Word},
        offer a much greater range of facilities than the first such
        programs.
     
        Compare {text editor}.
     
        (1995-04-14)