1. Device that removes something from whatever passes through it
   "They installed a water filter to remove impurities from their drinking water"
    
2. An electrical device that alters the frequency spectrum of signals passing through it
   "The audio engineer used a low-pass filter to reduce high-frequency noise in the recording"
    
3. [Brit] A traffic light used to allow some of the traffic to turn off while the rest remains stopped
   "The filter allowed left-turning vehicles to proceed while the main traffic was held"

1. Remove by passing through a filter
   "filter out the impurities";
   - filtrate, strain, filter out
    
2. Pass through
   "The rain slowly filtered through the soil";
   - percolate, sink in, permeate
    
3. Run or flow slowly, as in drops or in an unsteady stream
   "water filtered onto the lawn from the broken hose";
   - trickle, dribble

Sounds like: fillip, Philter, philtre, phi

Derived forms: filtering, filters, filtered

See also: go under

Type of: course, device, electrical device, feed, flow, penetrate, pierce, run, separate

Encyclopedia: Filter, map, reduce