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filter

[ fil-ter ]
/ ˈfɪl tər /
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See synonyms for: filter / filtered / filtering on Thesaurus.com

noun

verb (used with object)

verb (used without object)

to pass or slip through slowly, as through an obstruction or a filter: Enemy agents managed to filter into the embattled country.

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Origin of filter

First recorded in 1375–1425; late Middle English filtre, from Medieval Latin filtrum “felt, piece of felt used to strain liquids,” from Germanic; see origin at felt2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for filter

filter
/ (ˈfɪltə) /

noun

verb

C16 filtre from Medieval Latin filtrum piece of felt used as a filter, of Germanic origin; see felt ²
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

Medical definitions for filter

filter
[ fĭltər ]

n.

v.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for filter

filter
[ fĭltər ]

A material that has very tiny holes and is used to separate out solid particles contained in a liquid or gas that is passed through it.
A device that allows signals with certain properties, such as signals lying in a certain frequency range, to pass while blocking the passage of others. For example, filters on photographic lenses allow only certain frequencies of light to enter the camera, while polarizing filters allow only light polarized along a given plane to pass. Radio tuners are filters that allow frequencies of only a narrow range to pass into an amplification circuit.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for filter

filter

A computer software program that selectively screens out incoming information.

Spam may be the target of a filter, or parents may use a filter designed to prevent their child's access to pornographic or violent Web pages.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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