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intrusion

 - 4 dictionary results

in⋅tru⋅sion

  [in-troo-zhuhn]
Use intrusion in a Sentence
–noun
1. an act or instance of intruding.
2. the state of being intruded.
3. Law.
a. an illegal act of entering, seizing, or taking possession of another's property.
b. a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.
4. Geology.
a. emplacement of molten rock in preexisting rock.
b. plutonic rock emplaced in this manner.
c. a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.
d. the matter forced in.
Origin:
1250–1300; ME < ML intrūsiōn- (s. of intrūsiō), equiv. to L intrūs(us), ptp. of intrūdere to intrude (equiv. to intrūd- v.s. + -tus ptp. suffix, with dt < s) + -iōn- -ion

Related forms:
in⋅tru⋅sion⋅al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To intrusion
in·tru·sion   (ĭn-trōō'zhən)   
n.  

  1. The act of intruding or the condition of being intruded on.

  2. An inappropriate or unwelcome addition.

  3. Law Illegal entry upon or appropriation of the property of another.

  4. Geology

    1. The forcing of molten rock into an earlier formation.

    2. The rock mass produced by an intrusive process.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

intrusion 
c.1387, from O.Fr. intrusion, from M.L. intrusionem (nom. intrusio) "a thrusting in," from L. intrusus, pp. of intrudere, from in- "in" + trudere "to thrust, push" (see extrusion). Intrude is first recorded 1534.
Online Etymology Dictionary, © 2001 Douglas Harper
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Legal Dictionary

Main Entry: in·tru·sion
Pronunciation: in-'trü-zh&n
Function: noun
1 a : the entry at common law of a stranger after a particular estate of freehold is determined before the person who holds it in remainder or reversion has taken possession b : the act of wrongfully entering upon, seizing, or taking possession of the property of another
2 : a trespassing on or encroachment upon something (as a right) intrusion —Berger v. New York, 388 U.S. 41 (1968)>
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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