in·​tru·​sion | \ in-ˈtrü-zhən How to pronounce intrusion (audio) \

Definition of intrusion

1 : the act of intruding or the state of being intruded especially : the act of wrongfully entering upon, seizing, or taking possession of the property of another
2 : the forcible entry of molten rock or magma into or between other rock formations also : the intruded magma

Examples of intrusion in a Sentence

Recent Examples on the Web Prince Harry has published an unprecedented statement about media intrusion this afternoon as it is announced that his wife Meghan has filed a legal claim against a British newspaper group. Victoria Murphy, Town & Country, "Meghan Markle Has Filed a Privacy Lawsuit Against the Mail on Sunday Newspaper," 1 Oct. 2019 Zoom is fine-tuning its video conferencing software and upgrading security features to help prevent zoom-bombing and other privacy intrusions. Mike Snider, USA TODAY, "Zoom boosts security features, encryption amid coronavirus crisis video conferencing boom," 23 Apr. 2020 Even if this intrusion is incredibly limited, users should be careful. Sam Machkovech, Ars Technica, "Nintendo accounts are getting hijacked—including one of ours [Updated]," 20 Apr. 2020 The berserk has returned to the public square, more extreme than ever, in a guise that seems new and yet also recalls earlier intrusions. George Packer, The Atlantic, "A Novelist’s Ambition to Define America," 18 Apr. 2020 This brings up another set of important policy issues: how to balance potential public-health benefits with intrusions on privacy by emerging surveillance-data collection technologies associated with digital transformation. David Shaywitz, National Review, "How Will Coronavirus Change the Health-Care Industry?," 1 Apr. 2020 Every day for the past week, fraudsters have placed an estimated 1 million or more suspected suspicious calls about coronavirus to Americans' smartphones, according to YouMail, which offers an app that blocks such unwanted telecom intrusions. Anchorage Daily News, "Scam robocalls are pitching fake coronavirus tests to vulnerable Americans," 19 Mar. 2020 The government realized Sunday that there had been a cyber intrusion and false information was circulating. Time, "Key U.S. Health Agency Suffers Cyberattack During Coronavirus Response," 16 Mar. 2020 All were tied to the Mabna Institute, an Iranian company behind cyber intrusions since at least 2013. Dorothy Denning, The Conversation, "How Iran’s military outsources its cyberthreat forces," 22 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'intrusion.' 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 intrusion

15th century, in the meaning defined at sense 1

History and Etymology for intrusion

Middle English, from Anglo-French, from Medieval Latin intrusion-, intrusio, from Latin intrudere

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Time Traveler for intrusion

Time Traveler

The first known use of intrusion was in the 15th century

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Statistics for intrusion

Last Updated

26 May 2020

Cite this Entry

“Intrusion.” Dictionary, Merriam-Webster, Accessed 3 Jun. 2020.

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More Definitions for intrusion


in·​tru·​sion | \ in-ˈtrü-zhən How to pronounce intrusion (audio) \

Kids Definition of intrusion

1 : the act of going or forcing in without being wanted
2 : something that goes in or interferes without being wanted The phone call was an unwelcome intrusion.


in·​tru·​sion | \ in-ˈtrü-zhən How to pronounce intrusion (audio) \

Legal Definition of intrusion

1a : the entry at common law of a stranger after a particular estate of freehold is determined before the person who holds it in remainder or reversion has taken possession
b : the act of wrongfully entering upon, seizing, or taking possession of the property of another
2 : a trespassing on or encroachment upon something (as a right) the Fourth Amendment demands that the showing of justification match the degree of intrusionBerger v. New York, 388 U.S. 41 (1968)

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