Source : Webster's Revised Unabridged Dictionary (1913)

Tamp \Tamp\, v. t. [imp. & p. p. {Tamped}; p. pr. & vb. n.
   {Tamping}.] [Cf. F. tamponner to plug or stop. See
   {Tampion}.]
   1. In blasting, to plug up with clay, earth, dry sand, sod,
      or other material, as a hole bored in a rock, in order to
      prevent the force of the explosion from being misdirected.

   2. To drive in or down by frequent gentle strokes; as, to
      tamp earth so as to make a smooth place.

Source : WordNet®

tamp
     v : press down tightly; "tamp the coffee grinds in the container
         to make espresso" [syn: {tamp down}, {pack}]

tamp
     n : a tool for tamping (e.g., for tamping tobacco into a pipe
         bowl or a charge into a drill hole etc.) [syn: {tamper},
         {tamping bar}]