intrusion

plural intrusions

1. countableuncountableThe forcible inclusion or entry of an external group or individual; the act of intruding.

   She viewed sales calls as an unwelcome intrusion.

   3 more examples

   Sudden anger rose in him. “What I’m looking for,” he barked, “is to be left in peace.” His voice trembled with a rage far bigger than her intrusion merited, the rage which shocked him whenever it coursed through his nervous system, like a flood.

   2001, Salman Rushdie, Fury: A Novel, London: Jonathan Cape, →ISBN, page 5

   The threat of terrorism to the British lies in the overreaction to it of British governments. Each one in turn clicks up the ratchet of surveillance, intrusion and security. Each one diminishes liberty.

   2012 December 14, Simon Jenkins, “We mustn't overreact to North Korea boys' toys”, in The Guardian Weekly, volume 188, number 2, page 23

   Electroencephalography (EEG), Electrocardiography (ECG), Galvanic Skin Response (GSR), Respiration Rate Analysis (RR), Skin Temperature Measurements (SKT), Electromyogram (EMG), Electrooculography (EOG), Facial Expressions (FE), Body Posture (BP), and Gesture Analysis (GA) are the main emotion recognition approaches that have been evolved in sensor technology and methods in recent years for affective HCI. Hybrid approaches, multimodal features and even the text that is typed in by users during a game or social media communication can serve as a possible starting point for the affect detection process and sentiment analysis in digital environments. Purpose, cost, intrusion, accuracy, user tolerance, and the computing processing power are the important elements involved in selecting and utilizing the sensing tools in each project.

   2020 October 6, Yoones A. Sekhavat, Milad Jafari Sisi, Samad Roohi, “Affective interaction: Using emotions as a user interface in games”, in Multimedia Tools and Applications, volume 80, →DOI, pages 5225–5253

   1. countableuncountableA penetration by hackers, a computer virus, etc.

      The intrusion of the virus rendered our other security efforts useless.

   2. countableuncountablehuman sciencesThe insertion of a phoneme into the pronunciation of a word despite its absence from the spelling. (e.g. intrusive r)

      A current challenge in recent work on Spanish sound structure is to understand the conditions that determine vowel intrusion and the consequences vowel intrusion may have on Spanish phonology.

      2009, Benjamin Schmeiser, edited by Marine Vigário, Sónia Frota, and M. João Freitas, Phonetics and Phonology: Interactions and Interrelations, →ISBN, page 181

2. Something that is intrusive or that has arisen from an act of intruding.
   1. uncountableA feeling of being intruded upon; the state or condition of being intruded.

      I watched and felt intrusion upon the reigning terror of them

      2021, Debbie Armstrong, Mental Exodus: Journey Between the Lines

   2. countableuncountablegeographyMagma forced into other rock formations; the rock formed when such magma solidifies.
   3. countableuncountableA structure that lies within a historic district but is nonhistoric and irrelevant to the district.

      This setting is slightly altered by modern intrusion.

      1969, The National Register of Historic Places, 1969, Washington, D.C.: National Park Service, page 275

      2 more examples

      Although there are modern intrusions (a road and communications facilities on the summit), the mountain is important to the Kumeyaay community's belief system.

      1997, Donna J. Seifert; Barbara J. Little; Beth L. Savage; John H., Jr. Sprinkle, “Defining boundaries for National Register properties”, in National Register Bulletin, Washington, D.C.: National Park Service, page 27

      In 1844, objection was raised to the Furness Railway's Dalton & Barrow line, when it was revealed that the line would pass directly through Furness Abbey. A re-route was achieved, with the line skirting the abbey ruins instead - although many continued to see the intrusion as a travesty against antiquity and the scenic beauty of the site.

      2022 January 12, Dr. Joseph Brennan, “Castles: ruined and redeemed by rail”, in RAIL, number 948, page 56

   4. countableuncountablehuman sciencesAn involuntarily arising idea or memory that is nuisant and falsifies an accurate impression of the world.

      Intrusion symptoms (e.g., nightmares) and anhedonia symptoms were associated with significantly lower probability of reporting moderate physical activity.

      2024 August 24, Laura M. Kinsman, Holden J. Norrie, Geoffrey S. Rachor, Gordon J. G. Asmundson, Exercise and PTSD, Springer, →DOI, →ISBN, page 248

      2 more examples

      In general, intrusion errors tend to occur with greater frequency in individuals whose cognitive capacity is diminished relative to that of young adults. Poor readers, older participants, and neuropsychological patients exhibit more intrusion errors than controls.

      2011, Karl Haberlandt, “Intrusion Errors”, in Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan, editor, Encyclopedia of Clinical Neuropsychology, →DOI, pages 1353–1354

      To our knowledge, there have been no longitudinal studies that have examined the association between semantic intrusion errors and the longitudinal progression of PreMCI to a formal diagnosis of MCI or, conversely, a return to a cognitively normal state over time. Further, the association between semantic intrusion errors and the progression to dementia among those with aMCI has not been examined.

      2021 June 23, Elizabeth A Crocco, Rosie E Curiel, Marcela Kitaigorodsky, Gabriella A Grau, Jessica M Garcia, Ranjan Duara, Warren Barker, Cesar L Chirinos, Rosemarie Rodriguez b, David A Loewenstein, “Intrusion errors and progression of cognitive deficits in older adults with mild cognitive impairment (MCI) and PreMCI States”, in Dementia and Geriatric Cognitive Disorders, volume 50, number 2, →DOI, pages 135–142

   5. collectivecountablerareuncountableA swarm or nest of cockroaches, infesting a structure.

      The sight of an intrusion had me running for an exterminator.

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      When I turned on the light, scattered mats of cockroach intrusions scurried into the walls.

      An intrusion of cockroaches scurried into a wall at the first instance of light.

      2025, John Greco, The Unlikely Intrusion of Adams Klein, Moody Publishers

      They are the sky now, and they are for the sky. Just as the intrusion of cockroaches underfoot has become the brown earth.

      2020, Charlie Kaufman, Antkind: A Novel, Random House Publishing Group

      Zillions of cockroaches crawled over everything, making the food-caked dishes seem to undulate with glistening carapaces as the intrusion of roaches searched them for food.

      2008, Eric Leif Davin, Fight the Power: A Memoir of the Sixties, DavinBooks, page 141

      intrusions of cockroaches huddled along the wall with their antennae twitching

      2014, Luke Gray, Three Ring Circus, page 106