olemus
vahend soovitava väljaeraldamiseks ja soovimatu tõkestuseks:
mehaaniline, elektriline, optiline, loogikaline vm

Merriam.Webster, noun:
1a: a porous article or mass (as of paper or sand) through which a gas or liquid is passed to separate out matter in suspension
1b: an apparatus containing a filter medium
2a: a device or material for suppressing or minimizing waves or oscillations of certain frequencies (as of electricity, light, or sound)
2b: a transparent material (such as colored glass) that absorbs light of certain wavelengths or colors selectively and is used for modifying light that reaches a sensitized photographic material
4: software for sorting or blocking access to certain online material

näiteid
https://en.wikipedia.org/wiki/Filter

vt ka
- Bayes'i filter
- dünaamiline paketifilter
- ekraanifilter
- filter (2)
- filtreerima (1)
- filtreerima (2)
- filtreerimine
- geofiltreerimine
- hall nimekiri
- irdpakettide filtreerimine
- mustfiltreerimine
- must nimekiri
- märksõnafilter
- paketifilter
- pakettide dünaamiline filtreerimine
- pakettide filtreerimine
- piirifilter
- portide filtreerimine
- rakenduskihtfiltreerimine
- reklaamifilter
- ribapääsfilter, ribafilter
- ruumfiltreerimine
- siseneva liikluse filtreerimine
- sisufilter
- spämmifilter
- valgefiltreerimine
- valge nimekiri
- veebifilter
- väljuva liikluse filtreerimine