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tamper1

[tam-per]
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verb (used without object)
  1. to meddle, especially for the purpose of altering, damaging, or misusing (usually followed by with): Someone has been tampering with the lock.
  2. to make changes in something, especially in order to falsify (usually followed by with): to tamper with official records.
  3. to engage secretly or improperly in something.
  4. to engage in underhand or corrupt dealings, especially in order to influence improperly (usually followed by with): Any lawyer who tries to tamper with a jury should be disbarred.
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Origin of tamper1

1560–70; probably variant of temper (v.)
Related formstam·per·er, nounun·tam·pered, adjective

Synonyms

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

shuffle, alter, fix, manipulate, falsify, contravene, defy, infringe, offend, oppose, disregard, breach, disrupt, disobey, evolve, reduce, resolve, reform, shift, vary

British Dictionary definitions for tamper with

tamper1

verb (intr)
  1. (usually foll by with) to interfere or meddle
  2. to use corrupt practices such as bribery or blackmail
  3. (usually foll by with) to attempt to influence or corrupt, esp by briberyto tamper with the jury
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Derived Formstamperer, noun

Word Origin

C16: alteration of temper (verb)

tamper2

noun
  1. a person or thing that tamps, esp an instrument for packing down tobacco in a pipe
  2. a casing around the core of a nuclear weapon to increase its efficiency by reflecting neutrons and delaying the expansion
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tamper with

tamper

v.

1560s, figurative use of tamper "to work in clay, etc., so as to mix it thoroughly," probably originally a variant of temper (v.), which is how it was initially spelled. Perhaps it is a dialectal workmen's pronunciation. Related: Tampered; tampering.

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Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with tamper with

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]

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2

Engage in improper or secret dealings, as in He was accused of tampering with the jury. [c. 1600]

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.