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filter British & World English

A porous device for removing impurities or solid particles from a liquid or gas passed through it

filter English Thesaurus

pass the water through a carbon filter

air filter British & World English

A device for filtering particles from the air passing through it, especially one protecting the air inlet of an internal-combustion engine

filter bed British & World English

A tank or pond containing a layer of sand or gravel, used for filtering large quantities of liquid

filter cake British & World English

A deposit of insoluble material left on a filter

filter pump British & World English

A pump used to purify water in a pool, pond, or tank

filter tip British & World English

A filter attached to a cigarette for removing impurities from the inhaled smoke

sand filter British & World English

A filter used in water purification and consisting of layers of sand arranged with coarseness of texture increasing downwards

spam filter British & World English

A piece of software that processes incoming emails so as to prevent spam from reaching a user’s inbox

sun filter British & World English

Another term for sunscreen.

colour filter British & World English

A photographic filter that absorbs light of certain colours

filter coffee British & World English

Coffee made by allowing water to pass through a paper or mesh filter containing ground coffee

filter paper British & World English

A piece of porous paper for filtering liquids, used especially in chemical processes and coffee-making

filter press British & World English

A device consisting of a series of cloth filters fixed to frames, used for the large-scale filtration of liquid under pressure

notch filter British & World English

A filter that attenuates signals within a very narrow band of frequencies

charcoal filter British & World English

A filter containing charcoal to absorb impurities

filter-feeding British & World English

(Of an aquatic animal) feeding by filtering out plankton or nutrients suspended in the water

skylight filter British & World English

A very slightly pink filter that reduces haze and excessive blueness of the sky in photographs by absorbing ultraviolet light

filter cigarette British & World English

A type of cigarette with an absorbent section at the end that removes impurities from the inhaled smoke

polarizing filter British & World English

A photographic or optical filter that polarizes the light passing through it, used chiefly for reducing reflections and improving contrast

neutral density filter British & World English

A photographic or optical filter that absorbs light of all wavelengths to the same extent, causing overall dimming but no change in colour


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