A device which separates a suspended, dissolved, or particulate matter from a fluid, solution, or other substance; any device that separates one substance from another.

filter bednoun

A layer of gravel, sand, or other material through which liquid is passed in order to remove impurities; also, a pond or tank containing such a layer.

filter bubblenoun

A state of intellectual isolation resulting from exposure to only highly personalized Internet content.

filter cakenoun

The dense mass of substances that gradually accumulates on a filter.

filter coffeenoun

Brewed coffee; made with water strained through a filter holding the coffee.

filter downverb

Of a liquid; to move slowly down to lower substrate levels.

filter feedernoun

Any aquatic animal that obtains nourishment by filtering particles of food from the water in which it lives.

filter outverb

To selectively remove part of something.

filter upverb

Of information, knowledge or practice; to move slowly up to other levels of an organisation, or population.

filterabilitynoun

The state or condition of being filterable.

filterableadj

Able to be separated by filtration

filteratesnoun

Misspelling of filtrates.

filteredadj

With a filter (e.g., a cigarette).

filterernoun

A person who, or device that, filters

filterestverb

second-person singular simple present indicative of filter

filterethverb

third-person singular simple present indicative of filter

filtergramnoun

A photograph of the sun at a particular frequency range (by means of a variable filter).

filteringnoun

The process of passing something through a filter.

filterlessadj

Without a filter.

filterlessnessnoun

The state, quality, or condition of being filterless.

filterlikeadj

Resembling or characteristic of a filter.

filtermannoun

A man employed to manage a physical process of filtration.

filtermatnoun

A mat of material used as a filter

Spelling & Dictionary Insight

The English alphabetical index for the letter F contains 18,613 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 373 pages, and you are currently viewing page 125. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "F" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.