Hypertext Webster Gateway: "filter"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Filter \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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Filter \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}.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Filter \Fil"ter\, v. i.
To pass through a filter; to percolate.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Filter \Fil"ter\, n.
Same as {Philter}.
From WordNet (r) 1.7 (wn)
filter
n 1: device that removes something from whatever passes through
it
2: n electrical device that alters the frequency spectrum of
signals passing through it
v 1: remove by passing through a filter; "filter out the
impurities" [syn: {filtrate}, {strain}, {separate out},
{filter out}]
2: pass through; "Water permeates sand easily" [syn: {percolate},
{sink in}, {permeate}]
3: run or flow slowly, or in an unsteady stream: "reports began
to dribble in." [syn: {trickle}, {dribble}]
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