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infiltrate

[in-fil-treyt, in-fil-treyt] /ɪnˈfɪl treɪt, ˈɪn fɪlˌtreɪt/
verb (used with object), infiltrated, infiltrating.
1.
to filter into or through; permeate.
2.
to cause to pass in by filtering.
3.
to move into (an organization, country, territory, or the like) surreptitiously and gradually, especially with hostile intent:
The troops infiltrated the enemy lines.
4.
to pass a small number of (soldiers, spies, or the like) into a territory or organization clandestinely and with hostile or subversive intent:
The intelligence agency infiltrated three spies into the neighboring country.
verb (used without object), infiltrated, infiltrating.
5.
to pass into or through a substance, place, etc., by or as by filtering.
6.
Pathology. to penetrate tissue spaces or cells.
noun
7.
something that infiltrates.
8.
Pathology. any substance penetrating tissues or cells and forming a morbid accumulation.
Origin
1750-1760
1750-60; in-2 + filtrate
Related forms
infiltrative
[in-fil-trey-tiv, in-fil-truh-] /ˈɪn fɪlˌtreɪ tɪv, ɪnˈfɪl trə-/ (Show IPA),
adjective
infiltrator
[in-fil-trey-ter, in-fil-trey-] /ˈɪn fɪlˌtreɪ tər, ɪnˈfɪl treɪ-/ (Show IPA),
noun
reinfiltrate, verb, reinfiltrated, reinfiltrating.
uninfiltrated, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for infiltrated
  • Goose meat is thoroughly infiltrated with fat, containing sometimes forty to forty-five per cent.
  • These air sacs arose from the lungs and infiltrated bone, which made the skeleton lighter while keeping it strong.
  • Residents and clean-up crews have reported many incidents of ecosystems being infiltrated with oil.
  • And now that so much human activity takes place in cyberspace, spies have infiltrated that realm as well.
  • They infiltrated the building through the ventilation system and methodically moved throughout the ducts.
  • The reactions could not begin again until new water infiltrated the reactor.
  • In a fifth, the bacterium had infiltrated the bones of one foot.
  • Using a dispersant or surfactant alone will not reduce the damage caused by the oil which will and has infiltrated the wetlands.
  • He adds that even mature pancreatic transplant tissue can become infiltrated to some extent by host blood vessels.
  • However, this is one of many ways that big business has infiltrated our systems for marketing and tracking purposes.
British Dictionary definitions for infiltrated

infiltrate

/ˈɪnfɪlˌtreɪt/
verb
1.
to undergo or cause to undergo the process in which a fluid passes into the pores or interstices of a solid; permeate
2.
(military) to pass undetected through (an enemy-held line or position)
3.
to gain or cause to gain entrance or access surreptitiously they infiltrated the party structure
noun
4.
something that infiltrates
5.
(pathol) any substance that passes into and accumulates within cells, tissues, or organs
6.
(pathol) a local anaesthetic solution injected into the tissues to cause local anaesthesia
Derived Forms
infiltration, noun
infiltrative, adjective
infiltrator, noun
Word Origin
C18: from in-² + filtrate
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 infiltrated

infiltrate

v.

1758, of fluids, from in- (2) "in" + filtrate. Related: Infiltrated; infiltrating. Military sense of "penetrate enemy lines" attested from 1934.

Online Etymology Dictionary, © 2010 Douglas Harper
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infiltrated in Medicine

infiltrate in·fil·trate (ĭn-fĭl'trāt', ĭn'fĭl-)
v. in·fil·trat·ed, in·fil·trat·ing, in·fil·trates

  1. To cause a liquid to permeate a substance by passing through its interstices or pores.

  2. To permeate a porous substance with a liquid or gas.

n.
An abnormal substance that accumulates gradually in cells or body tissues.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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