Definition of Filtir

Fil"ter (?), n. [F. filtre, the same word as feutre felt, LL. filtrum, feltrum, felt, fulled wool, this being used for straining liquors. See Feuter.] 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.

Filter bed, a pond, the bottom of which is a filter composed of sand gravel. -- Filter gallery, an underground gallery or tunnel, alongside of a stream, to collect the water that filters through the intervening sand and gravel; -- called also infiltration gallery.

Fil"ter, v. t. [imp. & p. p. Filtered (?); p. pr. & vb. n. Filtering] [Cf. F. filter. See Filter, n., and cf. Filtrate.] To purify or defecate, as water or other liquid, by causing it to pass through a filter.

Filtering paper, or Filter paper, a porous unsized paper, for filtering.

Fil"ter, v. i. To pass through a filter; to percolate.

Fil"ter, n. Same as Philter.

A device which separates a suspension or particle matter from a fluid, or solution.
Electronic or software structure separating unwanted signal (for example noise) from wanted signal
(transitive) what a filter does
(intransitive) action happening to material going to filter

Danish
a filter

Dutch
a filter

German
a filter

Swedish
a filter

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