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# filter

«filter» in Mova's school dictionary: **a material or device with tiny holes that lets liquid or…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### part of speech

noun (a filter, filters); verb (filter, filters, filtered, filtering)

### meaning for a pupil

1) A filter is a material or device with tiny holes that lets liquid or air pass but catches solid bits. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#m1)

2) To filter is to pass something through a filter to clean or separate it. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#m2)

3) A filter is a setting that changes or blocks something, like a photo filter or an internet filter. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#m3)

4) To filter in or out is to move slowly in small amounts, like light or people. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#m4)

### sense in the lessons

In science, filtering separates an insoluble solid (like sand) from a liquid (like water) using filter paper and a funnel; dissolved salt passes through. Water treatment plants filter water to make it safe. Coffee machines, fish tanks and vacuum cleaners have filters. In online safety, filters block harmful websites. Phrases: filter paper, water filter, air filter, filter out, sunlight filtered through.

### examples

- We filtered the muddy water through filter paper. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x1)
- The sand stayed in the filter. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x2)
- Salt passes through a filter because it is dissolved. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x3)
- Our fish tank has a filter to keep it clean. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x4)
- Sunlight filtered through the leaves. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x5)
- The school internet has a filter. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x6)
- She added a funny filter to the photo. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/#x7)

### note

A filter cannot remove dissolved things like salt or sugar; for that you evaporate the water. Filtered water from a stream may still have germs; it is not always safe to drink. Do not confuse filter with sieve: a sieve has bigger holes.

### In the corpora

- [Many online photos are filtered or edited; comparing your real face to an edited picture is unfair on yourself.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/47-viral-rumours-cancellations-fakes-and-apologies/9/)
- [Photos online are often smoothed with filters; real skin has lines and spots, and nobody looks like a filter.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/53-breakfast-and-chat-shows-celebrity-gossip-on-the-sofa/19/)
- [Safe search is a setting that filters out adult results when you search, though it can miss some.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/60-next-time-switch-off-tell-and-parental-controls/16/)
- [Safety settings and children's accounts filter unsuitable content, but they are not perfect, so telling a grown-up still matters.](https://md.mova.elamur.ai/free/en/corpora/school/ai/15-bots-are-not-doctors-helplines-are-people/18/)
- [Spam filters use AI to spot junk and scam emails, but some real emails end up in the spam folder too.](https://md.mova.elamur.ai/free/en/corpora/school/ai/19-ai-in-one-ordinary-day/6/)

### Trees and pragmatics

[Every meaning and example of «filter» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/F/filter/), each sentence with its dependency tree and frames.