Source : WordNet®

baseline
     n 1: an imaginary line or standard by which things are measured
          or compared; "the established a baseline for the budget"
     2: the back line bounding each end of a tennis or handball
        court; when serving the server must not step over this
        line [syn: {service line}]
     3: the lines a baseball player must follow while running the
        bases

Source : Free On-Line Dictionary of Computing

baseline
     
        {released version}