intrusion

[ in-troo-zhuhn ]

/ ɪnˈtru ʒən /

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See synonyms for: intrusion / intrusions on Thesaurus.com

noun

an act or instance of intruding.

the state of being intruded.

Law.

an illegal act of entering, seizing, or taking possession of another's property.
a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.

Geology.

emplacement of molten rock in preexisting rock.
plutonic rock emplaced in this manner.
a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.
the matter forced in.

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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

OTHER WORDS FROM intrusion

in·tru·sion·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use intrusion in a sentence

Aside from reaching an international audience, leaving Oz had another benefit—no more silly intrusions into her privacy.
CNN's Overnight Sydney Star|Lloyd Grove|December 16, 2014|DAILY BEAST
When she finally got around to doing it, the intrusions started soon after.
Iran Is Using a Neocon to Hack Its Foes|Eli Lake|May 30, 2014|DAILY BEAST
Critics of Israel will see the blue islands as Israeli intrusions into Palestine.
Has Anyone Seen A Map Of E1?|Gil Troy|December 27, 2012|DAILY BEAST
Con Ed will have to deal with widespread intrusions into the duct banks and transformers that lie below the city streets.
How Long Until New York Gets Back Up and Running?|Megan McArdle|October 30, 2012|DAILY BEAST

We want to ensure our ability to cripple criminal activity while preventing intrusions into our personal privacy.
Congress Braces for Battle Over Cybersecurity Bill|Philip Bump|April 23, 2012|DAILY BEAST
Chief among them was the putting an end to the intrusions of the outside claimants to Narragansett.
A short history of Rhode Island|George Washington Greene
The tertiary formation is followed by an azoic formation of gneiss, mica slate, and phylada with large intrusions of granite.
Guatemala, the country of the future|Charles M. Pepper
I am not a coward—far from it—but I confess that such intrusions at the last minute are always disconcerting.
The Extraordinary Adventures of Arsene Lupin, Gentleman-Burglar|Maurice Leblanc
These intrusions upon the Indian territory were, however, conformable to the grants of the proprietors, the Indians.
Great Events in the History of North and South America|Charles A. Goodrich
But that is a confusion of thought, for these tyrannies are merely intrusions of the eighteenth century upon the twentieth.
A Preface to Politics|Walter Lippmann

British Dictionary definitions for intrusion

intrusion

/ (ɪnˈtruːʒən) /

noun

the act or an instance of intruding; an unwelcome visit, interjection, etcan intrusion on one's privacy

the movement of magma from within the earth's crust into spaces in the overlying strata to form igneous rock
any igneous rock formed in this way

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

Derived forms of intrusion

intrusional, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for intrusion

intrusion

[ ĭn-trōō′zhən ]

The movement of magma through cracks in underground rocks within the Earth, usually in an upward direction.♦ 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. Compare extrusion.

intrusion

Origin of intrusion

OTHER WORDS FROM intrusion

Words related to intrusion

How to use intrusion in a sentence

British Dictionary definitions for intrusion

Derived forms of intrusion

Scientific definitions for intrusion