Definitions for Intrusionɪnˈtru ʒən
This page provides all possible meanings and translations of the word Intrusion
invasion, encroachment, intrusion(noun)
any entry into an area not previously occupied
"an invasion of tourists"; "an invasion of locusts"
entrance by force or without permission or welcome
the forcing of molten rock into fissures or between strata of an earlier rock formation
rock produced by an intrusive process
trespass, encroachment, violation, intrusion, usurpation(noun)
entry to another's property without right or permission
The forcible inclusion or entry of an external group or individual; the act of intruding.
He viewed sales calls as an unwelcome intrusion.
the act of intruding, or of forcing in; especially, the forcing (one's self) into a place without right or welcome; encroachment
the penetrating of one rock, while in a plastic or metal state, into the cavities of another
the entry of a stranger, after a particular estate or freehold is determined, before the person who holds in remainder or reversion has taken possession
the settlement of a minister over 3 congregation without their consent
Origin: [Cf. F. intrusion. See Intrude.]
An intrusion is liquid rock that forms under Earth's surface. Magma from under the surface is slowly pushed up from deep within the earth into any cracks or spaces it can find, sometimes pushing existing country rock out of the way, a process that can take millions of years. As the rock slowly cools into a solid, the different parts of the magma crystallize into minerals. Many mountain ranges, such as the Sierra Nevada in California, are formed mostly by intrusive rock, large granite formations. Intrusions are one of the two ways igneous rock can form; the other is extrusive, that is, a volcanic eruption or similar event. Technically speaking, an intrusion is any formation of intrusive igneous rock; rock formed from magma that cools and solidifies within the crust of the planet. In contrast, an extrusion consists of extrusive rock; rock formed above the surface of the crust. Intrusions vary widely, from mountain-range-sized batholiths to thin veinlike fracture fillings of aplite or pegmatite. When exposed by erosion, these cores called batholiths may occupy huge areas of Earth's surface. Large bodies of magma that solidify underground before they reach the surface of the crust are called plutons.
Dictionary of Military and Associated Terms
Movement of a unit or force within another nation
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