tam·​per | \ ˈtam-pər How to pronounce tamper (audio) \
tampered; tampering\ ˈtam-​p(ə-​)riŋ How to pronounce tampering (audio) \

Definition of tamper

intransitive verb

1a : to interfere so as to weaken or change for the worse used with with did not want to tamper with tradition
b : to try foolish or dangerous experiments used with with
c : to render something harmful or dangerous by altering its structure or composition was charged with tampering with consumer products
2a : to carry on underhand or improper negotiations (as by bribery)
b : to inflict physical harm, threats, intimidation, or corrupt persuasion with the goal of influencing or preventing a witness's testimony : to engage in witness tampering used with with These alleged efforts were the basis for Mueller's accusation that Manafort was tampering with a witness, attempting to coach testimony, which would have violated the terms of his bail.— Franklin Foer

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Other Words from tamper

tamperer \ ˈtam-​pər-​ər How to pronounce tamperer (audio) \ noun
tamperproof \ ˈtam-​pər-​ˌprüf How to pronounce tamperproof (audio) \ adjective

Examples of tamper in a Sentence

Recent Examples on the Web

The girl's mother's former fiancé, Derion Vence, is charged with tampering with a corpse in connection with Maleah's death. Lauren M. Johnson, CNN, "Sculptor memorializes Maleah Davis with a bronze statue, so no one forgets," 29 June 2019 Troconis and Dulos were both charged earlier this month with tampering with evidence and hindering prosecution in connection with disappearance of Farber Dulos. Dave Altimari, courant.com, "Fotis Dulos, estranged husband of Jennifer Farber Dulos, asks court to halt contentious divorce case as judge orders no contact between Dulos and his girlfriend Michelle Troconis," 28 June 2019 Subsequently, Fotis, and Michelle Troconis, 44, who was allegedly having an affair with him, were arrested and charged with tampering with or fabricating physical evidence and hindering prosecution in connection with the case. Kc Baker, PEOPLE.com, "Dad Charged in Connection with Disappearance of Conn. Mom Says Kids Are 'Constantly on My Mind'," 27 June 2019 Police ultimately arrested Vence, the fiancé, in connection with her disappearance, charging him with tampering with a corpse. Emily Foxhall, Houston Chronicle, "Maleah Davis to be buried in private service Saturday," 22 June 2019 Barber was charged with tampering with physical evidence and attempting to hide Bourret’s body Tuesday. Austin Taylor, ExpressNews.com, "Affidavit: Text messages, voice mail key in identifying suspects in disappearance case," 21 June 2019 The trip along Albany Avenue was caught on police surveillance cameras and was cited in arrest warrants charging Dulos and his girlfriend, Michelle Troconis with tampering with evidence and hindering prosecution. Dave Altimari, courant.com, "Sources: The black Ford Raptor owned by Fotis Dulos’ company was in New Canaan on day Jennifer Dulos disappeared — but he wasn’t driving it," 14 June 2019 Fotis Dulos and Michelle Troconis were arrested June 1 and charged with tampering with or fabricating physical evidence and hindering prosecution in relation to Jennifer Dulos' May 24 disappearance. CNN, "Prosecutors say his DNA was found mixed with his missing wife's blood. He's now out on bond," 12 June 2019 Evans was additionally charged with tampering with evidence. Doha Madani, NBC News, "Video released of Ohio corrections officer who turned off body camera beating mentally-ill inmate," 7 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tamper.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tamper

1567, in the meaning defined at sense 2

History and Etymology for tamper

probably from Middle French temprer to temper, mix, meddle — more at temper entry 2

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Dictionary Entries near tamper






tamper with


Statistics for tamper

Last Updated

3 Jul 2019

Look-up Popularity

Time Traveler for tamper

The first known use of tamper was in 1567

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More Definitions for tamper


tam·​per | \ ˈtam-pər How to pronounce tamper (audio) \
tampered; tampering

Kids Definition of tamper

: to interfere or change in a secret or incorrect way Someone was tampering with the official records.

Legal Definition of tamper

1 : to bring improper influence to bear (as by bribery or intimidation) used with with tampered with the jurors
2 : to alter or interfere in an unauthorized or improper manner used with with tampered with evidence

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More from Merriam-Webster on tamper

Spanish Central: Translation of tamper

Nglish: Translation of tamper for Spanish Speakers

Britannica.com: Encyclopedia article about tamper

Comments on tamper

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