device that removes something from whatever passes through it
an electrical device that alters the frequency spectrum of signals passing through it
filter (n.)
remove by passing through a filter; filter out the impurities
[ Syn: filtrate , strain , separate out , filter out ]
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; reports began to dribble in