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1. Dictionary

   in·tru·sion

   /inˈtro͞oZH(ə)n/

   noun

   • 1. the action of intruding: "he was furious about this intrusion into his private life"
   • ▪ a thing that intrudes: "they oppose the excavations as an intrusion on their heritage"
   • 2. the action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
   • ▪ a body of igneous rock which has intruded the surrounding strata.

   Word Origin late Middle English (in the sense ‘invasion, usurpation’): from medieval Latin intrusio(n-), from Latin intrudere ‘thrust in’ (see intrude).

   Scrabble Points: 9

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2. www.merriam-webster.com › dictionary › intrusionIntrusion Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › intrusion

   • Cached

   Learn the meaning of intrusion as the act of wrongfully entering or seizing the property of another, or the entry of molten rock into rock formations. See examples, synonyms, word history, and legal and kids definitions of intrusion.

3. dictionary.cambridge.org › dictionary › englishINTRUSION | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   Intrusion is the act of going into a place or situation where you are not wanted or do not belong, or the flowing of hot melted rock into existing rocks. Learn more about the meaning, usage, and synonyms of intrusion with Cambridge Dictionary.

4. www.dictionary.com › browse › intrusionINTRUSION Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › intrusion

   • Cached

   intrusion. / ɪnˈtruːʒən / noun. the act or an instance of intruding; an unwelcome visit, interjection, etc. an intrusion on one's privacy. the movement of magma from within the earth's crust into spaces in the overlying strata to form igneous rock. any igneous rock formed in this way.

5. dictionary.cambridge.org › us › dictionaryINTRUSION | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

   • Cached

   Intrusion is the act of going into a place or situation where you are not wanted or do not belong. It can also mean the flowing of hot melted rock into existing rocks. See more meanings, synonyms, collocations and examples of intrusion.

6. www.vocabulary.com › dictionary › intrusionIntrusion - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › intrusion

   An intrusion is a deliberate move into someone else's territory — either literal or figurative. When your sister interrupts your conversation with that girl from math class, that's an intrusion. If someone breaks into your home, that's also an intrusion.

7. www.thefreedictionary.com › intrusionIntrusion - definition of intrusion by The Free Dictionary

   www.thefreedictionary.com › intrusion

   • Cached

   Intrusion is the act of entering or forcing something into an area or a situation without permission or welcome. It can also refer to a geological process or rock formation, or a military term for surveillance or intelligence gathering.

8. www.collinsdictionary.com › dictionary › englishINTRUSION definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

   • Cached

   Intrusion is an unwelcome or unlawful act of entering or interfering with someone or something. It can also refer to the movement of magma or salt into rock, or a type of igneous rock.