filter
noun
1. device that removes something from whatever passes through it
Definition categories: man–made, device
2. an electrical device that alters the frequency spectrum of signals passing through it
Definition categories: man–made
Sentences with filter as a noun:
- He runs an email filter to catch the junk mail.
- He's got no filter, and he's always offending people as a result.
- The collection of cofinite subsets of ℝ is a filter under inclusion: it includes the intersection of every pair of its members, and includes every superset of every cofinite set.
- 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.
verb
1. remove by passing through a filter
- filter out the impurities
Similar word(s): filtrate, strain
Definition categories: contact, separate
2. pass through
Similar word(s): percolate, permeate
Definition categories: contact, penetrate, perforate
3. run or flow slowly, as in drops or in an unsteady stream