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filter down

1. (literally) Of a liquid, to slowly seep down through lower substrate levels. The company bottles rainwater that has filtered down through seven layers of volcanic rock, purifying it and enriching it with minerals.
2. (by extension) Of information, resources, communication, etc., to move slowly and in small amounts down to lower levels of people in an organization, population, or group. It always takes a dog's age for any important company information to filter down to me and the other interns. The government has approved a staggering $200 billion stimulus package, but some experts warn it could be years before that money filters down to individuals and smaller businesses.
See also: down, filter

filter up

Of information, resources, communication, etc., to move slowly and in small amounts up to higher levels of people in an organization, population, or group. Local think-tanks are developing new, pragmatic strategies to deal with the burgeoning housing crisis, but they are unlikely to filter up to the agenda of state lawmakers anytime soon.
See also: filter, up


A common hashtag on the social media and photo-sharing platform Instagram for pictures that have not been altered with the variety of filters offered in the app. What a gorgeous sunset tonight. #nofilter

filter out

To keep something from being known or experienced. A noun or pronoun can be used between "filter" and "out." These must not be noise-canceling headphones because they're not filtering out any of conversations currently going on around me in the coffee shop.
See also: filter, out

filter through (something)

To move or pass through some thing. No, it won't be too dark in here—a good amount of light will still filter through these sheer curtains.
See also: filter, through

filter in

 (to some place)
1. Lit. to leak or seep into some place. The smell of bacon cooking filtered into his room and made him wake up. The smoke filtered in and burned our eyes.
2. Fig. [for people] to come into a place, a few at a time, over a period of time. One by one, the guests filtered into the room. They filtered in and started on the snacks.
See also: filter

filter something out of something

 and filter something out
to remove something from a fluid by running it through a filter. We filtered the odors out of the water and made it fit to drink. I'm glad you filtered out the odor.
See also: filter, of, out

filter through (something)

to pass or seep through something. The water filtered through the coffee grounds and dripped into the pot. The clear water filtered through and left the sand behind.
See also: filter, through

filter down

To pass or spread downward from an upper level to lower levels, as through a filter: The information slowly filtered down from management to the hourly employees.
See also: down, filter

filter out

To prevent something from passing through, being communicated, or being perceived: My new glasses filter out ultraviolet rays. These headphones filter unwanted noise out.
See also: filter, out

filter through

To be allowed to pass through something or to find a way through something, especially an obstacle: The sunlight filtered through the thin curtains.
See also: filter, through

bozo filter

n. a setting on an internet email reader that will filter out selected annoying people. (Refers to bozo, a jerk.) Welcome to my bozo filter, jerk!
See also: bozo, filter
References in periodicals archive ?
With Bayesian statistical filtering, the words in an incoming email message are evaluated based on the frequency that they appear in spam and non-spam email.
With proper education and the right filtering product, parents and administrators can rest assured that their children's Internet experience is safe.
8e6 Technologies helps small or under-staffed education IT departments by providing a one-source shop for standalone Internet filtering and reporting solutions.
Blocking inappropriate content was cited as the most critical need for filtering by a little less than half the respondents but still remains the top priority in Web filtering -- as the survey was designed to highlight.
8e6 Technologies helps lift the burden felt by over-stretched IT departments by providing a one-source shop for standalone Internet filtering and reporting solutions.
It was necessary to judge whether filtering would hinder the filling of the mold cavity, and if the temperature of the metal and the fineness of the filter would affect this concern.
8e6 Technologies remains committed to ensuring child safety by delivering innovative filtering solutions with features tailored to the K-12 market, unlike enterprise-class alternatives that do not address the unique needs of educators.
Many cabin air filters also include an activated carbon layer for filtering out noxious gases and odors.
8e6 Technologies, a security company dedicated to Internet filtering and reporting, today announced the release of new high-availability carrier-class Web filtering and reporting solutions.
Higher filtering efficiency, including soot removal
8e6 Technologies, a leading provider of Internet security appliances for threat monitoring, reporting and remediation, has announced new features for its flagship R3000 Internet filtering appliance.
Recognized as the global leader in the OEM anti-spam market, the Mail-Filters technology is currently deployed with over 30,000 enterprise customers, filtering millions of mailboxes, in over 100 countries and supporting over 30 languages.