[ tam-per ]
/ ˈtæm pər /

verb (used without object)

to meddle, especially for the purpose of altering, damaging, or misusing (usually followed by with): Someone has been tampering with the lock.
to make changes in something, especially in order to falsify (usually followed by with): to tamper with official records.
to engage secretly or improperly in something.
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.

Origin of tamper

1560–70; probably variant of temper (v.)



tam·per·er, nounun·tam·pered, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for untampered

  • But the walls were solid and untampered with, and the nails in the floor had clearly not been disturbed for many years.

    In Friendship's Guise|Wm. Murray Graydon
  • Not a single bar had been wretched; the locks, shutters, and bolts were all untampered with.

  • Apparently it had been untampered with, for the key worked perfectly.

    The Voice on the Wire|Eustace Hale Ball

British Dictionary definitions for untampered (1 of 2)

/ (ˈtæmpə) /

verb (intr)

(usually foll by with) to interfere or meddle
to use corrupt practices such as bribery or blackmail
(usually foll by with) to attempt to influence or corrupt, esp by briberyto tamper with the jury

Derived forms of tamper

tamperer, noun

Word Origin for tamper

C16: alteration of temper (verb)

British Dictionary definitions for untampered (2 of 2)

/ (ˈtæmpə) /


a person or thing that tamps, esp an instrument for packing down tobacco in a pipe
a casing around the core of a nuclear weapon to increase its efficiency by reflecting neutrons and delaying the expansion
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