intrusion

American  

[in-troo-zhuhn] / ɪnˈtru ʒən /

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.

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intrusion British  

/ 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

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intrusion Scientific  

/ ĭn-tro̅o̅′zhən /

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

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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

In the opening episode, the narrator travels to Rhode Island to interview Thomas for a magazine article—a big deal, because Thomas is 90 and unlikely to consent to this kind of personal intrusion again.

From The Wall Street Journal

Attackers only need to get through once, while defenders need to stop all intrusions.

From Barron's

With the writer’s blessing he jotted down their conversations and interviewed his friends and associates; McMurtry tolerated these intrusions “as long as he could pretend I wasn’t writing a book,” Mr. Streitfeld tells us.

From The Wall Street Journal

Weed emphasized that software flaws, which are the primary target of Claude’s code-scanning abilities, are only a small source of actual intrusions.

From MarketWatch

Writing in a local cafe is not only cheaper—the price of a café au lait—but also offers the illusion of companionship without any of its intrusions.

From The Wall Street Journal

Related Words

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