Source : Webster's Revised Unabridged Dictionary (1913)

Acrobat \Ac"ro*bat\, n. [F. acrobate, fr. Gr. ? walking on
   tiptoe, climbing aloft; ? high + ? to go.]
   One who practices rope dancing, high vaulting, or other
   daring gymnastic feats.

Source : WordNet®

acrobat
     n : an athlete who performs acts requiring skill and agility and
         coordination

Source : Free On-Line Dictionary of Computing

Acrobat
     
         A product from {Adobe Systems, Inc.}, for
        manipulating documents stored in {Portable Document Format}.
        Acrobat provides a {platform}-independent means of creating,
        viewing, and printing documents.
     
        {Acropolis: the magazine of Acrobat publishing
        (http://www.acropolis.com/acropolis)}.
     
        (1995-04-21)