• WordNet 3.6
    • n intrusion entrance by force or without permission or welcome
    • n intrusion entry to another's property without right or permission
    • n intrusion any entry into an area not previously occupied "an invasion of tourists","an invasion of locusts"
    • n intrusion rock produced by an intrusive process
    • n intrusion the forcing of molten rock into fissures or between strata of an earlier rock formation
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Webster's Revised Unabridged Dictionary
    • Intrusion 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?"
    • Intrusion (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.
    • Intrusion (Geol) The penetrating of one rock, while in a plastic or metal state, into the cavities of another.
    • Intrusion (Scotch Ch) The settlement of a minister over a congregation without their consent.
    • ***
Century Dictionary and Cyclopedia
    • n intrusion The act of intruding; the act of entering without warrant or justification; unbidden, unwelcome, or unfit entrance into or upon anything.
    • n intrusion Specifically, in law: A wrongful entry after the determination of a particular estate, say for life, and before the freehold remainderman or reversioner can enter.
    • n intrusion In English law, any trespass committed on the public lands of the crown, as by entering thereon without title, holding over after a lease is determined, taking the profits, cutting down timber, and the like.
    • n intrusion Usurpation, as of an office.—
    • n intrusion A thrusting or pushing in, as of something out of place; irregular or abnormal entrance or irruption: as, an intrusion of foreign matter; the intrusion of extrinsic rocks or dikes in a geological formation. See intrusive rocks, under intrusive.
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Chambers's Twentieth Century Dictionary
    • Intrusion act of intruding or of entering into a place without welcome or invitation: encroachment: a pushing in, an abnormal irruption, esp. in geology, of such rocks as have come up from below into another rock or series of beds
    • ***


  • Willa Cather
    “The condition every art requires is, not so much freedom from restriction, as freedom from adulteration and from the intrusion of foreign matter.”
  • Robert Chapman
    Robert Chapman
    “A quotation, like a pun, should come unsought, and then be welcomed only for some propriety of felicity justifying the intrusion.”
  • Fyodor Dostoevsky
    “Sarcasm: the last refuge of modest and chaste-souled people when the privacy of their soul is coarsely and intrusively invaded.”


Webster's Revised Unabridged Dictionary
Cf. F. intrusion,. See Intrude
Chambers's Twentieth Century Dictionary
L. in, in, trudĕre, trusum, to thrust.


In literature:

All companionship, all intrusion, he bore with irritability and impatience.
"The Disowned, Complete" by Edward Bulwer-Lytton
Nor are these present pages a bit of intrusive autobiography.
"Our Old Home" by Nathaniel Hawthorne
Pray do not think me intrusive or impertinent for saying so; but I am sure of it.
"Henry Dunbar" by M. E. Braddon
Before this intrusion Miss Nugent retreated in alarm, and gaining the door-step gazed at him in dismay.
"At Sunwich Port, Complete" by W.W. Jacobs
Jacopo Sansovino marks the final intrusion of paganism into modern art.
"Renaissance in Italy Vol. 3" by John Addington Symonds
I offer a thousand apologies for the intrusion!
"The Castle Inn" by Stanley John Weyman
We will expect the bride to make her first cake, or the flour to begin to fly into the face of the intrusive ice-man.
"The Art Of The Moving Picture" by Vachel Lindsay
Seized with a solemn fear, my presence there seemed to me a strange intrusion.
"Across China on Foot" by Edwin Dingle
Frank, angered beyond measure by this bold intrusion, would have sprung toward him, to attack him, had not the Colonel waved him back.
"In Old Kentucky" by Edward Marshall and Charles T. Dazey
I see him sometimes at the office, you know, where he still treats me like an intrusive subscription agent.
"Queed" by Henry Sydnor Harrison

In poetry:

Princess, all hail!
Forgive the bold intrusion of thy servant,
Who stands a charm'd spectator of thy goodness.
"Moses In The Bulrushes. A Sacred Drama" by Hannah More
From the lusts whose deep pollution
Adam's elder taint disclose,
From the Tempter's dark intrusion,
And from everlasting woes;
"Hymn 11. Third Sunday After Epiphany" by Reginald Heber
But the quiver of intrusion
Through those curtains folds will run.
Measuring silence with your footsteps,
Like the future, in you'll come.
"There'll be no one in the house..." by Boris Pasternak
"Lo, now they stand in braver mien,
And, claiming stronger shadow-right,
Make prisoner of the intrusive light,
And strew the winds with green.
"Kadisha; Or, The First Jealousy" by Richard Doddridge Blackmore
Yet the dark Angel's touch
Dissolv'd that dire control,
And where the love-knot cannot break
Nor pain nor grief intrusion make,
Bore the sweet soul.
"Mrs. Alice Beckwith," by Lydia Howard Huntley Sigourney
He who, 'midst the world's delusions,
Keeps his heart serene and free,
Sheltered safe from the intrusions
Of unhallowed vanity;—
He, heaven's crown of bliss shall wear,
He, earth's brightest portion share.
""Ye cannot serve God and Mammon"" by John Bowring

In news:

Regardless of your political affiliation or ideology, you must be aware that this is a period in our nation's history when we are wondering where and when this government intrusion will end.
Voters say no to health-care intrusion and older judges.
State Crime Lab testing in home intrusion awaited.
Shooting case decision pending in fatal home intrusion .
Yet another network intrusion .
Sony hackers keep coming as the company detects another intrusion .
Defense contractor Lockheed Martin is dealing with problems in its internal network after a suspected intrusion reportedly using the RSA SecurID tokens.
Lockheed Martin Shuts Down Remote Network Access After Detecting Intrusion .
Austin hates federal intrusion , yet loves to butt in on our affairs.
Pilot would test an intrusion prevention system for GOV that uses technology developed by NSA.
The Port Authority's newly installed Perimeter Intrusion Detection System took four years and at least $100-million dollars to build.
Has sued the architectural firm of Poché Prouet Associates over moisture and water intrusion problems at Charles M.
Buyer's Guide: Windows Server Intrusion Detection Products.
Intrusion detection systems used to be a must-have for technology security managers.
Cell phones are a wonderful technology, but they can also be a major intrusion .

In science:

As expected, the delays are higher, but still sufficiently non-intrusive when observin g the behavior of routing protocols or addressing mechanisms with real wireless links and users.
Rapid Prototyping over IEEE 802.11
In addition, we have not detected any intrusion of massive particles in the region of interest during the whole simulation.
Is AGN feedback necessary to form red elliptical galaxies?
Recently, we presented first results from a detector, “SONGS1”, developed to demonstrate this method as a possible non-intrusive, remotely operated safeguards tool .
Monitoring the Thermal Power of Nuclear Reactors with a Prototype Cubic Meter Antineutrino Detector
As far as Turing tests are concerned, we can see, that this method is very intrusive.
SPAM over Internet Telephony and how to deal with it
Intrusion Detection Systems base on the assumption, that the characteristics of attacks differ much from characteristics of normal calls.
SPAM over Internet Telephony and how to deal with it