filter

Noun
  1. Device that removes something from whatever passes through it (synset 103344588)
    is a type of: device - an instrumentality invented for a particular purpose
    subtypes:
    • air cleaner, air filter - a filter that removes dust from the air that passes through it
    • bacteria bed - layer of sand or gravel used to expose sewage effluent to air and the action of microorganisms
    • coffee filter - filter (usually of paper) that passes the coffee and retains the coffee grounds
    • drain basket - a filter in a sink drain; traps debris but passes water
    • filter bed - filter consisting of a layer of sand or gravel for filtering water
    • fuel filter - a filter in the fuel line that screens out dirt and rust particles from the fuel
    • diffusing screen, light filter - a transparent filter that reduces the light (or some wavelengths of the light) passing through it
    • oil filter - a filter that removes impurities from the oil used to lubricate an internal-combustion engine
    • strainer - a filter to retain larger pieces while smaller pieces and liquids pass through
    • water filter - a filter to remove impurities from the water supply
    • glass wool - glass fibers spun and massed into bundles resembling wool
    • diatomaceous earth, diatomite, kieselguhr - a light soil consisting of siliceous diatom remains and often used as a filtering material
  2. An electrical device that alters the frequency spectrum of signals passing through it (synset 103344954)
    is a type of: electrical device - a device that produces or is powered by electricity
    subtypes:
    • high-pass filter - a filter that passes frequencies above a certain value and attenuates frequencies below that value
    • low-pass filter - a filter that passes frequencies below a certain value and attenuates frequencies above that value
Verb
  1. Remove by passing through a filter (synset 201461293)
    "filter out the impurities"
    is a type of: separate - divide into components or constituents
    same as: filter out, filtrate, separate out, strain
  2. Pass through (synset 201460583)
    "Water permeates sand easily"
    is a type of: penetrate, perforate - pass into or through, often by overcoming resistance
    subtypes:
    • infiltrate - pass into or through by filtering or permeating
    • infiltrate - cause (a liquid) to enter by penetrating the interstices
    same as: percolate, permeate, sink in
  3. Run or flow slowly, as in drops or in an unsteady stream (synset 202074802)
    "water trickled onto the lawn from the broken hose"; "reports began to dribble in"
    is a type of: course, feed, flow, run - move along, of liquids
    subtypes: leach, percolate - permeate or penetrate gradually
    same as: dribble, trickle

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