[ in-fil-treyt, in-fil-treyt ]
/ ɪnˈfɪl treɪt, ˈɪn fɪlˌtreɪt /
verb (used with object), in·fil·trat·ed, in·fil·trat·ing.
to filter into or through; permeate.
to cause to pass in by filtering.
to move into (an organization, country, territory, or the like) surreptitiously and gradually, especially with hostile intent: The troops infiltrated the enemy lines.
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), in·fil·trat·ed, in·fil·trat·ing.
to pass into or through a substance, place, etc., by or as by filtering.
Pathology. to penetrate tissue spaces or cells.
something that infiltrates.
Pathology. any substance penetrating tissues or cells and forming a morbid accumulation.
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Related formsin·fil·tra·tive [in-fil-trey-tiv, in-fil-truh-] /ˈɪn fɪlˌtreɪ tɪv, ɪnˈfɪl trə-/, adjectivein·fil·tra·tor [in-fil-trey-ter, in-fil-trey-] /ˈɪn fɪlˌtreɪ tər, ɪnˈfɪl treɪ-/, nounre·in·fil·trate, verb, re·in·fil·trat·ed, re·in·fil·trat·ing.un·in·fil·trat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for infiltrator
Nor it just the Post—"infiltrator" is also used by the Israeli news site Ynet and by the Religious Zionist Arutz Sheva.
One, that he might possibly have been an infiltrator working for the FBI?Warren Commission (10 of 26): Hearings Vol. X (of 15)|The President's Commission on the Assassination of President Kennedy
British Dictionary definitions for infiltrator
/ (ˈɪnfɪlˌtreɪt) /
to undergo or cause to undergo the process in which a fluid passes into the pores or interstices of a solid; permeate
military to pass undetected through (an enemy-held line or position)
to gain or cause to gain entrance or access surreptitiouslythey infiltrated the party structure
something that infiltrates
pathol any substance that passes into and accumulates within cells, tissues, or organs
pathol a local anaesthetic solution injected into the tissues to cause local anaesthesia
Derived Formsinfiltration, nouninfiltrative, adjectiveinfiltrator, noun
Word Origin for infiltrate
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
Word Origin and History for infiltrator
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for infiltrator
[ ĭn-fĭl′trāt′, ĭn′fĭl- ]
To cause a liquid to permeate a substance by passing through its interstices or pores.
To permeate a porous substance with a liquid or gas.
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.