The Collaborative International Dictionary of English v.0.48:

Tiptoe \Tip"toe`\, a.
   1. Being on tiptoe, or as on tiptoe; hence, raised as high as
      possible; lifted up; exalted; also, alert.
      [1913 Webster]

            Night's candles are burnt out, and jocund day
            Stands tiptoe on the misty mountain tops. --Shak.
      [1913 Webster]

            Above the tiptoe pinnacle of glory.   --Byron.
      [1913 Webster]

   2. Noiseless; stealthy. "With tiptoe step." --Cowper.
      [1913 Webster]

   Tiptoe mirth, the highest degree of mirth. --Sir W. Scott.
      [1913 Webster]