Dictionary definition · filter
noun
- device that removes something from whatever passes through it
- an electrical device that alters the frequency spectrum of signals passing through it
verb
- remove by passing through a filter"filter out the impurities"
- pass through"Water permeates sand easily"
- run or flow slowly, as in drops or in an unsteady stream"water trickled onto the lawn from the broken hose"
Source: Open English WordNet (CC BY 4.0).