What is the meaning of Tamper_with?

A person or thing that tamps.

A tool used to tamp something down, such as tobacco in a pipe.

A railway vehicle used to tamp down ballast.

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.

To make unauthorized or improper alterations, sometimes causing deliberate damage; to meddle (with something).

To try to influence someone, usually in an illegal or devious way; to try to deal (with someone).

To meddle (with something) in order to corrupt or pervert it.

To involve oneself (in a plot, scheme, etc.).

To attempt to practise or administer something (especially medicine) without sufficient knowledge or qualifications.

To discuss future contracts with a player, against league rules.

This term needs a translation to English. Please help out and add a translation, then remove the text {{rfdef}}.

Source: wiktionary.org