n 1 : a porous article or mass (as of paper or sand) through which a gas or liquid is passed to separate out matter in suspension 2 : an apparatus containing a filter medium 3 a : a device or material for suppressing or minimizing waves or oscillations of certain frequencies (as of electricity, light, or sound) b : a transparent material (as colored glass) that absorbs light of certain wavelengths or colors selectively and is used for modifying light that reaches a sensitized photographic material - called also color filter
vb, fil*tered fil*ter*ing vt 1 : to subject to the action of a filter 2 : to remove by means of a filter vi : to pass or move through or as if through a filter .
Similar sounding terms: fel·la·tor float·er flut·ter phil·ter
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