filter
Pronunciation
[change]Noun
[change]![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Dirty-air-filter.jpg/220px-Dirty-air-filter.jpg)
- (countable) A filter is a piece of equipment that put gas or liquid through to take out the parts you don't want, to clean it.
Verb
[change]
Plain form |
Third-person singular |
Past tense |
Past participle |
Present participle |
- (transitive) If you filter a gas or a liquid, you put it through something that takes out the parts you don't want.
- We filter the water.