Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.

tamper with (something)

To make harmful or subversive alterations to something; to meddle or interfere with something. Investigators concluded that someone had tampered with the control unit of the machine. He's been accused of tampering with the committee tasked with selecting successful applicants. The locks have not been tampered with and there is no sign of a break-in anywhere on the premises.
See also: tamper
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

tamper with someone or something

to fiddle with someone or something; to meddle with someone or something. I've got him believing just what I want him to believe. Don't tamper with him. Please don't tamper with the thermostat.
See also: tamper
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

tamper with

1. Interfere or meddle, especially in a harmful way. For example, If you tamper with that lock it's sure to break. [c. 1600]
2. Engage in improper or secret dealings, as in He was accused of tampering with the jury. [c. 1600]
See also: tamper
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

tamper with

To interfere with something in a harmful manner: Someone has been tampering with my mail—these letters have been opened! When jurors reported that they had been offered bribes, the judge told the defense not to tamper with the jury.
See also: tamper
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also:
References in periodicals archive ?
The tamper evident labeller from LSS seals the carton.
With relevant keys, the receiver can easily decrypt the watermarked encrypted image and conduct tamper detection, tamper localization, and image recovery.
A threshold value is set to filter out the tampered regions, i.e.
[20] proposed a dual layer reversible watermarking technique with tamper detection capability for medical images.
The group's solicitor, Niri Shan, said it did not intend to imply that Pietersen might have tampered with his bat.
While some packaging solutions need to be modified to achieve tamper evidence (a bottle, for example, is not tamper evident until a tamper-evident seal is added), blister packaging is inherently tamper evident.
"Our linerless labels are now shipped globally through our Distributor network making up nearly 60 percent of our tamper evident label business," says Chris Chiles, managing director for Tamper Technologies.
In a country like India, where damages in transit or tampered couriers are a common sight, e-retailers lose customers every time a damaged product is delivered to him.
In fact, these little figures are pipe tampers and were intended to be hung as fobs from a gentleman's watch chain.
The words "tamper" and "seal" provide clues as to the technology used to ensure the integrity of the documents.
"The entire job can be accomplished by anyone with reasonable mechanical aptitude using basic hand tools and is completed in about 45 minutes, and the tamper is ready to use," said Willis.