intrusion

noun
in·​tru·​sion | \in-ˈtrü-zhən \

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

The company discovered the intrusion on March 25 and disclosed it in under a week—some welcome hustle from a large company. Lily Hay Newman, WIRED, "The Worst Cybersecurity Breaches of 2018 So Far," 9 July 2018 At stake in this case is the right to shape, for oneself, without unwarranted governmental intrusion, one’s own identity, destiny, and place in the world. David Pitt, BostonGlobe.com, "Iowa court blocks 72-hour waiting period for abortion," 29 June 2018 Supporters say the delta's delivery system is outdated and increasingly vulnerable to earthquakes, flooding, saltwater intrusion, sea level rise, and environmental degradation. Christopher Weber, The Christian Science Monitor, "Construction of massive water tunnels wins approval in California," 11 Apr. 2018 The administration followed through with a string of sanctions this year in response to election hacking as well as cyberattacks and recent cyber intrusions on the US energy grid. Washington Post, BostonGlobe.com, "Senate defense bill pushes Trump to get tougher on Russian hacking," 19 June 2018 The administration followed through with a string of sanctions this year in response to election hacking as well as cyberattacks and recent cyber intrusions on the U.S. energy grid. Derek Hawkins, Washington Post, "The Cybersecurity 202: Senate defense bill pushes Trump to get tougher on Russian hacking," 19 June 2018 Multiple layers of protection, including software, hardware, network architecture features, and governance are designed to ensure the security of all critical flight systems from intrusion. Kris Van Cleave, CBS News, "DHS experts warn it's a "matter of time" before hackers hit commercial airliners," 12 June 2018 The latest step by the Trump administration comes in response to Russian cyberattacks on the US and its allies, including the NotPetya cyberattack and cyber intrusions of the US energy grid. Donna Borak, CNN, "US unveils new Russia sanctions over cyberattacks," 11 June 2018 There are plenty of guides available on how to protect your data, how to secure yourself online, and how to stop digital snoops from tracking you across the web and then profiting from that intrusion. Brian Barrett, WIRED, "A Location-Sharing Disaster Shows How Exposed You Really Are," 19 May 2018

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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Statistics for intrusion

Last Updated

11 Nov 2018

Look-up Popularity

Time Traveler for intrusion

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

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More Definitions for intrusion

intrusion

noun
in·​tru·​sion | \in-ˈtrü-zhən \

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.

intrusion

noun
in·​tru·​sion | \in-ˈtrü-zhən \

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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