Source : Webster's Revised Unabridged Dictionary (1913)

Tiptoe \Tip"toe`\, v. i.
   To step or walk on tiptoe.

Tiptoe \Tip"toe`\, n.; pl. {Tiptoes}.
   The end, or tip, of the toe.

         He must . . . stand on his typtoon [tiptoes].
                                                  --Chaucer.

         Upon his tiptoes stalketh stately by.    --Spenser.

   {To be}, or {To stand}, {a tiptoe} or {on tiptoe}, to be
      awake or alive to anything; to be roused; to be eager or
      alert; as, to be a tiptoe with expectation.

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

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

            Above the tiptoe pinnacle of glory.   --Byron.

   2. Noiseless; stealthy. ``With tiptoe step.'' --Cowper.

   {Tiptoe mirth}, the highest degree of mirth. --Sir W. Scott.

Source : WordNet®

tiptoe
     adj : walking on the tips of ones's toes so as to make no noise;
           "moving with tiptoe steps"
     n : the tip of a toe
     adv : on tiptoe or as if on tiptoe; "standing tiptoe"
     v : walk on one's toes [syn: {tip}, {tippytoe}]