verb (used with or without object), fil·trat·ed, fil·trat·ing.
- to filter.
- liquid that has been passed through a filter.
- a liquid or gas that has been filtered
- another name for filter (def. 7)
1610s, probably a back-formation from filtration. As a noun, from 1846.
- To put or go through a filter.
- Material, especially liquid, that has passed through a filter.