Meaning of FILTER in English

FILTER

n. & v.

--n.

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

2 filter tip.

3 a screen or attachment for absorbing or modifying light, X-rays, etc.

4 a device for suppressing electrical or sound waves of frequencies not required.

5 Brit. a an arrangement for filtering traffic. b a traffic-light signalling this.

--v.intr. & tr.

1. pass or cause to pass through a filter.

2 (foll. by through, into, etc.) make way gradually.

3 (foll. by out) leak or cause to leak.

4 Brit. allow (traffic) or (of traffic) be allowed to pass to the left or right at a junction while traffic going straight ahead is halted (esp. at traffic lights).

Phrases and idioms:

filter-bed a tank or pond containing a layer of sand etc. for filtering large quantities of liquid. filter-paper porous paper for filtering. filter tip

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

2 a cigarette with this. filter-tipped having a filter tip.

Etymology: F filtre f. med.L filtrum felt used as a filter, f. WG

Oxford English vocab.      Оксфордский английский словарь.