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[in-troo-siv] /ɪnˈtru sɪv/
tending or apt to intrude; coming without invitation or welcome:
intrusive memories of a lost love.
characterized by or involving intrusion.
intruding; thrusting in.
  1. (of a rock) having been forced between preexisting rocks or rock layers while in a molten or plastic condition.
  2. noting or pertaining to plutonic rocks.
Phonetics. excrescent (def 2).
Origin of intrusive
late Middle English
late Middle English word dating back to 1375-1425; See origin at intrusion, -ive
Related forms
intrusively, adverb
intrusiveness, noun
nonintrusive, adjective
nonintrusively, adverb
unintrusive, adjective
unintrusively, adverb
1. annoying, bothersome, interfering, distracting, irksome, worrisome, troublesome, irritating, disturbing. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for intrusive
Contemporary Examples
Historical Examples
  • For all his assertiveness in matters of opinion he is not an intrusive person.

    Notes on My Books Joseph Conrad
  • This was impertinent, but then she herself was an intrusive guest.

    They of the High Trails

    Hamlin Garland
  • "If they would not think me inquisitive or intrusive," answered Clementina.

  • I had been a fortnight at Janenne when my intrusive phantom left me on Lorette.

    Schwartz: A History David Christie Murray
  • Do not think me intrusive or importunate if I now call, dear sir, on you, to remember it!'

    Art in England

    Dutton Cook
British Dictionary definitions for intrusive


characterized by intrusion or tending to intrude
(of igneous rocks) formed by intrusion Compare extrusive (sense 2)
(phonetics) relating to or denoting a speech sound that is introduced into a word or piece of connected speech for a phonetic rather than a historical or grammatical reason, such as the (r) often pronounced between idea and of in the idea of it
Derived Forms
intrusively, adverb
intrusiveness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for intrusive

c.1400, from Latin intrus-, past participle stem of intrudere (see intrusion) + -ive. Related: Intrusively; intrusiveness.

Online Etymology Dictionary, © 2010 Douglas Harper
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