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Longman Dictionary of Contemporary English
▪ Huntly and - basic to ultrabasic intrusions of Arthrath Caledonian age intruding pyritic and graphitic Dalradian metasediments.
▪ The island was uplifted and igneous intrusions took place.
▪ Volcanicity and magma emplacement, largely in the form of large granite intrusions, characterize the volcanic arc.
▪ Eventually granite intrusions are emplaced at high levels within the mountain mass and volcanic activity develops.
▪ Extensive stretching of the crust above these granite intrusions produces a faulted terrain with active volcanoes.
▪ This was the major period of emplacement of granite intrusions which resulted in the growth of the Western Cordillera.
▪ The modem phase of orogeny began in the Miocene with volcanism and the further emplacement of granite intrusions.
▪ Perhaps she was not feeling well, or it could be that she resented Lissa's intrusion into the office.
▪ The miners probably resented the intrusion but must have been fearful of the possible consequences of this calamity.
▪ He must resent the impertinent intrusion of the big car.
▪ Are you sure that my staying here won't be an intrusion?
▪ Some players resent the intrusion of religion into sports.
The Collaborative International Dictionary

Intrusion \In*tru"sion\, n. [Cf. F. intrusion. See Intrude.]

  1. The act of intruding, or of forcing in; especially, the forcing (one's self) into a place without right or welcome; encroachment.

    Why this intrusion? Were not my orders that I should be private?

  2. (Geol.) The penetrating of one rock, while in a plastic or metal state, into the cavities of another.

  3. (Law) 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.

  4. (Scotch Ch.) The settlement of a minister over a congregation without their consent.

Douglas Harper's Etymology Dictionary

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).


n. The forcible inclusion or entry of an external group or individual; the act of intruding.

  1. n. any entry into an area not previously occupied; "an invasion of tourists"; "an invasion of locusts" [syn: invasion, encroachment]

  2. entrance by force or without permission or welcome

  3. the forcing of molten rock into fissures or between strata of an earlier rock formation

  4. rock produced by an intrusive process

  5. entry to another's property without right or permission [syn: trespass, encroachment, violation, usurpation]

Intrusion (novel)

Intrusion is a 2012 science fiction novel by Ken MacLeod.

Usage examples of "intrusion".

John Barleycorn was going to regret his intrusion into my family and my city.

Dressed only in her undertunic, Cassandra jumped at the intrusion, wrapping her arms about herself.

But the procedures stated explicitly that the Elders were not to be alerted in cases of suspected intrusion, probably because every such incident for the past hundred cyclics had turned out to be a false alarm.

But they were paying a lot of money to the straight Dagwood Bumstead techies, some of them working for the FCIC, to search for traces of intrusion.

It was a violence, a terrible intrusion in the succession of moments, a clot in diachrony, and with the dumb arrogance of its existence it paid the outrage of ontology no mind.

It was gratifying to see that the dogs knew instinctively what was wanted of them: nobody could come near without the dogs warning their handlers of an intrusion.

He could have learned of this from messages being sent by United Airlines to the cockpits of its transcontinental flights, including Flight 93, warning of cockpit intrusion and telling of the New York attacks.

It was home base for the police force which protected the Fuzzies and maintained surveillance of their territory against Terran intrusion.

I confess to you that I have deliberately courted the peerage, because of its influence upon the reins of government, to protect my interests against such intrusion and exposure.

Had she not destroyed the young boy, the American, in her fury at his intrusion, the coitus interruptus of her vision on the road?

But the intrusion of Jukes upon the situation at that moment was rather awkward for X.

On the same basis that governed Bracy, Sleeper was drawing a gun, to do his share in keeping Mayberry and Chalmody free from intrusion!

This secretion serves the double purpose of moistening the outer surface of the membrana tympani, or ear-drum, and, by its strong odor, of preventing the intrusion of insects.

They could hear ovenbirds and protho-notary warblers singing in the woods, but apart from that the air was curiously still, as if their intrusion into the grounds of Le Reposoir had been noticed by nature at large, and a general breath was being held until they were discovered.

Once in place, it protects against intrusions from without, like a shell.