from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A porous material through which a liquid or gas is passed in order to separate the fluid from suspended particulate matter.
- n. A device containing such a material, especially one used to extract impurities from air or water.
- n. Any of various electric, electronic, acoustic, or optical devices used to reject signals, vibrations, or radiations of certain frequencies while allowing others to pass.
- n. A colored glass or other transparent material used to select the wavelengths of light allowed to reach a photosensitive material.
- n. Computer Science A program or routine that blocks access to data that meet a particular criterion: a Web filter that screens out vulgar sites.
- transitive v. To pass (a liquid or gas) through a filter.
- transitive v. To remove by passing through a filter: filter out impurities.
- transitive v. Computer Science To use a filter to block access to (a website or Web content).
- intransitive v. To pass through or as if through a filter: Light filtered through the blinds.
- intransitive v. To come or go gradually and in small groups: The audience filtered back into the hall.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.
- n. Electronics or software that separates unwanted signals (for example noise) from wanted signals or that attenuates selected frequencies.
- n. Any item, mechanism, device or procedure that acts to separate or isolate.
- n. A non-empty upper set (of a partially ordered set) which is closed under binary infima (a.k.a. meets).
- v. To sort, sift, or isolate.
- v. To diffuse; to cause to be less concentrated or focused.
- v. To pass through a filter or to act as though passing through a filter.
- v. To move slowly or gradually; to come or go a few at a time.
- v. To ride a motorcycle between lanes on a road
from the GNU version of the Collaborative International Dictionary of English
- n. Any porous substance, as cloth, paper, sand, or charcoal, through which water or other liquid may passed to cleanse it from the solid or impure matter held in suspension; a chamber or device containing such substance; a strainer; also, a similar device for purifying air.
- transitive v. To purify or defecate, as water or other liquid, by causing it to pass through a filter.
- intransitive v. To pass through a filter; to percolate.
- n. Same as philter.
from The Century Dictionary and Cyclopedia
- n. A device for arresting and separating any matter mechanically suspended in a liquid.
- n. Specifically In fish-culture, a long box in which screens, usually of flannel, are placed, through which the water is filtered before it passes into the hatching-troughs. Also called filtering-box, filtering-tank.
- To purify or defecate, as water or other liquid, by passing it through a filter or any cleansing medium; strain.
- Specifically In analytic chemistry, to separate (a solution) from the solid matter contained in it, either for the purpose of collecting and saving the solid matter, usually a precipitate, or of preparing the solution for further operations.
- To percolate; pass through or as through a filter.
- Same as felter.
- n. See philter.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. run or flow slowly, as in drops or in an unsteady stream
- v. pass through
- v. remove by passing through a filter
- n. an electrical device that alters the frequency spectrum of signals passing through it
- n. device that removes something from whatever passes through it
Middle English filtre, from Old French, from Medieval Latin filtrum, of Germanic origin.(American Heritage® Dictionary of the English Language, Fourth Edition)
(noun) From Medieval Latin filtrum, from West Germanic *filtiz. (Wiktionary)