Tamper n. : One who tamps; specifically, one who prepares for blasting, by filling the hole in which the charge is placed.

Tamper n. : An instrument used in tamping; a tamping iron.

Tamper v. i. : To meddle; to be busy; to try little experiments; as, to tamper with a disease.

Tamper v. i. : To meddle so as to alter, injure, or vitiate a thing.

Tamper v. i. : To deal unfairly; to practice secretly; to use bribery.

Example:
How is a Tamper used in making espresso?

Taxonomy
Tamper, free encyclopedia, physical security, tape, Tamper detection, ground coffee beans, ballast tamper, compromise, search, free dictionary, espresso, tamps, track ballast, Sir John, John Scott, shell, fission, nuclear material.

Defination from the web:
tamper, a machine that tamps track ballast, invented by Sir John Scott. ... Tamper evidence: the external indication that an attempt has been made to compromise the physical security of a module. ...