intrusion
Americannoun
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an act or instance of intruding.
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the state of being intruded.
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Law.
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an illegal act of entering, seizing, or taking possession of another's property.
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a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.
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Geology.
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emplacement of molten rock in preexisting rock.
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plutonic rock emplaced in this manner.
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a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.
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the matter forced in.
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noun
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the act or an instance of intruding; an unwelcome visit, interjection, etc
an intrusion on one's privacy
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the movement of magma from within the earth's crust into spaces in the overlying strata to form igneous rock
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any igneous rock formed in this way
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property law an unlawful entry onto land by a stranger after determination of a particular estate of freehold and before the remainderman or reversioner has made entry
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The movement of magma through cracks in underground rocks within the Earth, usually in an upward direction.
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◆ Rocks that form from the underground cooling of magma are generally coarse-grained (because they cool slowly so that large crystals have time to grow) and are called intrusive rocks.
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Compare extrusion
Other Word Forms
- intrusional adjective
Etymology
Origin of intrusion
1250–1300; Middle English < Medieval Latin intrūsiōn- (stem of intrūsiō ), equivalent to Latin intrūs ( us ), past participle of intrūdere to intrude (equivalent to intrūd- verb stem + -tus past participle suffix, with dt < s ) + -iōn- -ion
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
That’s commonly near the center of the office floor, far from windows and close to permanent shear walls that limit sound intrusion.
From Los Angeles Times
“Well, I suppose I should be upset by the intrusion. Then again, it didn’t feel much like an intrusion. I simply talked and the stranger listened. An ideal arrangement, in my books.”
From Literature
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Pregnancy for Hedda is as distasteful a matter as these in-law intrusions, but it’s clear that George didn’t spend his entire honeymoon in the library and that the marriage plot has got ahead of her.
From Los Angeles Times
However, concerns over those intrusions "escalated significantly" following the discovery of the threatening graffiti.
From BBC
“Restoration is the name of the game, not intrusion,” Mike told me, and he wasn’t talking just about the estuary.
From Los Angeles Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.