1. (

• filter

) device that removes something from whatever passes through it ;

2. (

• filter ,

) an electrical device that alters the frequency spectrum of signals passing through it ;

1. (

• filter ,
• filtrate ,
• strain ,
• separate_out ,
• filter_out

) remove by passing through a filter; "filter out the impurities" ;

2. (

• percolate ,
• sink_in ,
• permeate ,
• filter ,

) pass through; "Water permeates sand easily" ;

3. (

• trickle ,
• dribble ,
• filter

) run or flow slowly, as in drops or in an unsteady stream; "water trickled onto the lawn from the broken hose"; "reports began to dribble in" ;