The process of passing something through a filter. / Something that passes through a filter.

plural of filtering

plural of filterer

device to remove unwanted substances from a liquid or gas

plural of Filter

plural of filter

Third-person singular simple present indicative form of filter

Of a liquid; to move slowly down to lower substrate levels. / (idiomatic) (by extension) Of information, or resources; to move slowly down to lower levels of an organisation, or population.

(slang) Any device that limits or suppresses the flow of bogons. / (slang, humorous) An imaginary device capable of preventing high-bogosity material from reaching its destination.

A filter of trapezoidal shape specified by four corner frequencies, f1 through f4. The filter rejects below f1 and above f4, is linear from f1 to f2 and from f3 to f4, and is flat from f2 to f3.