• An envelope of neutron-reflecting material in a nuclear weapon, used to delay the expansion of the reacting material and thus produce a longer-lasting and more energetic explosion.
  • A tool used to tamp something down, such as tobacco in a pipe.
  • A person or thing that tamps.


  • (in professional sports) To discuss future contracts against league rules with a player.
  • (intransitive) To alter by making unauthorized changes; to meddle.

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