intrusion

[in-troo-zhuh n]

SEE MORE SYNONYMS FOR intrusion 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.

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

Related formsin·tru·sion·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for intrusions

imposition, encroachment, interference, invasion, incursion, intervention, infraction, impingement, meddling, trespass, transgression, inroad, interposition, obtrusion

Examples from the Web for intrusions

Contemporary Examples of intrusions

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
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

Historical Examples of intrusions

I would have defied their scoundrelism as much as I have scorned all the other intrusions of life.
Victory
Joseph Conrad
The country swarms with savage Indians, who are jealous of the intrusions of strangers.
The Prehistoric World
E. A. Allen
I withdrew the "intrusions" with difficulty, and returned to the woman who had fainted.
On a Donkey's Hurricane Deck
R. Pitcher Woodward
I've no time or taste for it, and I don't wish to be annoyed by intrusions into my home.
The Grain Of Dust
David Graham Phillips
It does not follow that all intrusions were those of conquerors.
Ancient Man in Britain
Donald A. (Donald Alexander) Mackenzie

British Dictionary definitions for intrusions

intrusion

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 Formsintrusional, 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

Word Origin and History for intrusions

intrusion

late 14c., from Old French intrusion (14c.), from Medieval Latin intrusionem (nominative intrusio) "a thrusting in," noun of action from past participle stem of Latin intrudere, from in- "in" (see in- (2)) + trudere "to thrust, push" (see extrusion).

intrusions in Science

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.