verb run or flow slowly, as in drops or in an unsteady stream.
— synonyms: trickle, dribble
Examples
“He runs an email filter to catch the junk mail.”
“He's got no filter, and he's always offending people as a result.”
“If (1) the universal set (here, the set of natural numbers) were called a "large" set, (2) the superset of any "large" set were also a "large" set, and (3) the intersection of a pair of "large" sets were also a "large" set, then the set of all "large" sets would form a filter.”