intrusion

[in-troo-zhuhn]

noun

1. an act or instance of intruding.

2. the state of being intruded.

3. Law.

   1. an illegal act of entering, seizing, or taking possession of another's property.

   2. a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.

4. Geology.

   1. emplacement of molten rock in preexisting rock.

   2. plutonic rock emplaced in this manner.

   3. a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.

   4. the matter forced in.

intrusion

/ ɪnˈtruːʒən /

noun

1. the act or an instance of intruding; an unwelcome visit, interjection, etc

   an intrusion on one's privacy

2. 1. the movement of magma from within the earth's crust into spaces in the overlying strata to form igneous rock

   2. any igneous rock formed in this way

3. 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

intrusion

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

2. ◆ 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.

3. Compare extrusion

Other Word Forms

• intrusional adjective

Word History and Origins

Origin of intrusion¹

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

“Yes, Lord Ashton. I was on my way upstairs to the nursery, and I, er, slipped. I apologize for the intrusion.”

Read more on Literature

The judge referenced Wen’s earlier intrusions and noted that he hadn’t faced consequences previously, the Straits Times reported.

Read more on Los Angeles Times

Most Americans have a strong moral resistance to military intrusion into civilian affairs.

Read more on Salon

Neighbouring Lithuania, which recently closed its last two border crossings with Belarus due to intrusions of balloons used for smuggling, plans to wait until November 30 to reopen them.

Read more on Barron's

She added the ruling had emphasised "any intrusion into a complainer's privacy must be no more than is necessary to ensure that the accused receives a fair trial".

Read more on BBC

Related Words

• encroachment 
• imposition 
• incursion 
• interference 
• intervention 
• invasion