from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To pack down tightly by a succession of blows or taps.
- transitive v. To pack clay, sand, or dirt into (a drill hole) above an explosive.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. 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.
- v. To drive in or pack down by frequent gentle strokes; as, to tamp earth so as to make a smooth place.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. 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.
- transitive v. To drive in or down by frequent gentle strokes.
from The Century Dictionary and Cyclopedia
- In blasting for quarrying and mining purposes, to fill (the hole made by the drill or borer) with tamping, after the charge of powder or other explosive has been introduced.
- To force in or down by frequent and somewhat light strokes: as, to tamp mud so as to make a floor.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. press down tightly
- n. a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.)
Perhaps back-formation from tampin, variant of tampion.(American Heritage® Dictionary of the English Language, Fourth Edition)
Probably related to French tamponner ("to plug or stop"). See tampion. (Wiktionary)