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[fil-treyt] /ˈfɪl treɪt/
verb (used with object), verb (used without object), filtrated, filtrating.
to filter.
liquid that has been passed through a filter.
Origin of filtrate
1605-15; < Medieval Latin filtrātus filtered, past participle of filtrāre. See filter, -ate1
Related forms
filtratable, adjective
filtration, noun
interfiltrate, verb (used with object), interfiltrated, interfiltrating.
interfiltration, noun
transfiltration, noun
unfiltrated, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for filtration
  • Water filtration is important, so it's a good idea to buy the best filter you can afford.
  • The water is piped to a filtration plant and then to a heat-transfer station on the lakeside.
  • Water used to irrigate food crops must undergo secondary filtration and disinfection.
  • Standard distillation or filtration techniques could extract the alcohol from the water.
  • We also make many events greener by offering convenient point of use filtration systems and dispensers.
  • The fabric, developed for use in filtration systems, is machine washable.
  • One result can be a dark line around the perimeter of the room, known as filtration soiling.
  • Chemical and filtration systems to neutralise it are its biggest cost.
  • They say failure to use filtration can result in permanent eye damage or even blindness.
  • Unfortunately there wasn't enough space in this article to get into the proposed filtration system.
British Dictionary definitions for filtration


the act or process of filtering


a liquid or gas that has been filtered
another name for filter (sense 7)
Derived Forms
filtratable, adjective
Word Origin
C17: from Medieval Latin filtrāre to filter
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 filtration

c.1600, perhaps from French filtration (1570s), noun of action from filter "to filter" (see filter (v.)).



1610s, probably a back-formation from filtration. As a noun, from 1846.

Online Etymology Dictionary, © 2010 Douglas Harper
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filtration in Medicine

filtration fil·tra·tion (fĭl-trā'shən)
The process of passing a liquid through a filter.

filtrate fil·trate (fĭl'trāt')
v. fil·trat·ed, fil·trat·ing, fil·trates
To put or go through a filter. n.
Material, especially liquid, that has passed through a filter.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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filtration in Science
The act or process of filtering, especially the process of passing a liquid or gas, such as air, through a filter in order to remove solid particles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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