Tamper can mean:

  • Tamp, a device used to compact or flatten an aggregate or other powdered or granular material, like ground coffee or gravel
  • A tool used to pack tobacco into a smoking pipe, as well as to flatten or scoop the ash; usually nail-shaped and sometimes combined into a pipe tool
  • Ballast tamper, a machine that tamps railroad track ballast
  • Tamper, or neutron reflector, a shell of dense material surrounding the fission core of a nuclear fission weapon