1. 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 pack down by frequent gentle strokes; as, to tamp earth so as to make a smooth place.

The above text is a snippet from Wiktionary: tamp
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!