Source : Webster's Revised Unabridged Dictionary (1913)

Pant \Pant\, v. i. [imp. & p. p. {Panted}; p. pr. & vb. n.
   {Panting}.] [Cf. F. panteler to gasp for breath, OF.
   panteisier to be breathless, F. pantois out of breath; perh.
   akin to E. phantom, the verb prob. orig. meaning, to have the
   nightmare.]
   1. To breathe quickly or in a labored manner, as after
      exertion or from eagerness or excitement; to respire with
      heaving of the breast; to gasp.

            Pluto plants for breath from out his cell. --Dryden.

   2. Hence: To long eagerly; to desire earnestly.

            As the hart panteth after the water brooks. --Ps.
                                                  xlii. 1.

            Who pants for glory finds but short repose. --Pope.

   3. To beat with unnatural violence or rapidity; to palpitate,
      or throb; -- said of the heart. --Spenser.

   4. To sigh; to flutter; to languish. [Poetic]

            The whispering breeze Pants on the leaves, and dies
            upon the trees.                       --Pope.

Source : WordNet®

panting
     adj : breathing laboriously or convulsively [syn: {blown}, {gasping},
            {out of breath(p)}, {pursy}, {short-winded}, {winded}]

panting
     n 1: breathing heavily (as after exertion) [syn: {heaving}]
     2: any fabric used to make trousers [syn: {trousering}]