Source : WordNet®

newsletter
     n : report or open letter giving informal or confidential news
         of interest to a special group [syn: {newssheet}]

Source : Free On-Line Dictionary of Computing

newsletter
     
         A periodically published work containing news
        and announcements on some subject, typically with a small
        circulation.  Newsletters are a common application for {DTP}
        and may be distributed by {electronic mail}.
     
        (1996-12-10)