verb (used with object), intruded, intruding.
to thrust or bring in without invitation, permission, or welcome.
Geology. to thrust or force into.
to install (a cleric) in a church contrary to the wishes of its members.
verb (used without object), intruded, intruding.
to thrust oneself without permission or welcome: to intrude upon their privacy.

1525–35; < Latin intrūdere to push in, equivalent to in- in-2 + trūdere to push

intruder, noun
intrudingly, adverb
self-intruder, noun
unintruded, adjective
unintruding, adjective
unintrudingly, adverb

4. interfere, interlope. See trespass. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
intrude (ɪnˈtruːd)
vb (often foll by into, on, or upon)
1.  to put forward or interpose (oneself, one's views, something) abruptly or without invitation
2.  geology to force or thrust (rock material, esp molten magma) or (of rock material) to be thrust between solid rocks
[C16: from Latin intrūdere to thrust in, from in-² + trūdere to thrust]

intruder (ɪnˈtruːdə)
a person who enters a building, grounds, etc, without permission

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Extreme care must be taken not to let them catch a glimpse of the intruder, for
  it is then hopeless to attempt approaching them.
The owner, upset about an intruder in his home, also called the emergency line
  to report the burglary.
The indictment suggested that the dog would have barked at an unknown intruder.
It is primarily designed to enable an intruder to hijack online bank accounts.
Related Words
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