intrusion

noun

in·​tru·​sion in-ˈtrü-zhən How to pronounce intrusion (audio)
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 Teenagers can be enormously secretive, resentful of unwanted intrusion into their personal business. Chris Wheatley, Longreads, 12 Mar. 2024 Nevertheless, the intrusions from passing players, often intent on killing Sam or Mark or each other, and non-player characters (NPCs) seem real enough — and heaven knows dramatic recreations are rampant these days in documentaries, there to fill out the bits the camera could never have captured. Leslie Felperin, The Hollywood Reporter, 10 Mar. 2024 Sunshine Canyon in Sylmar, the only landfill larger than Chiquita Canyon in L.A. County, is dealing with a different environmental crisis: Water intrusion has fueled bacteria growth. Grace Toohey, Los Angeles Times, 24 Feb. 2024 The committee was formed in 2023 and has held numerous hearings focused on human rights, trade, cyber intrusions and other issues central to the rising tensions between the two superpowers. Democrat-Gazette Staff From Wire Reports, arkansasonline.com, 23 Feb. 2024 To Fend Off Attacks, Fraud And Breaches: To decrease the chances of security intrusions, data breaches, online fraud and even advanced cyberattacks like ransomware, organizations must train employees on how such incursions can cause business disruption, loss of reputation and failure. Stu Sjouwerman, Forbes, 23 Feb. 2024 It was then later reconfirmed in 2019 due to ongoing threats such as pollution, climate change, severe weather, invasive species, and human intrusion. Julia Daye, Miami Herald, 21 Feb. 2024 Forests have also been displaced due to the intrusion of saltwater and the subsiding land. Caitlin O'Kane, CBS News, 21 Feb. 2024 Anduril acquired Copious Imaging in 2021 and adapted WISP for use with its counter-UAS, air defense, maritime surface threat detection, and counter intrusion systems (border and base security). Eric Tegler, Forbes, 13 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'intrusion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

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

First Known Use

15th century, in the meaning defined at sense 1

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

Dictionary Entries Near intrusion

Cite this Entry

“Intrusion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/intrusion. Accessed 29 Mar. 2024.

Kids Definition

intrusion

noun
in·​tru·​sion in-ˈtrü-zhən How to pronounce intrusion (audio)
1
: the act of intruding : the state of being intruded
2
: the entry by force of melted rock into or between other rock formations

Legal Definition

intrusion

noun
in·​tru·​sion in-ˈtrü-zhən How to pronounce intrusion (audio)
1
a
: 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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