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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 ?
We used a 400-Hz vacuum, NSN 7910-00-530-6260, that sucked up sand in the shelters and compartments and then could be reversed to blow out filters.
Before running out to buy a better filter for your home, please understand that this simple act of wanting cleaner air could produce some negative side-effects.
For instance, the user could quickly build a custom filter for a carpet pattern in her living room and then use it to retrieve photos taken at home.
Company scientists filter some surface-water samples that have a lot of sediment, but they've never found radioactive contaminants above the drinking-water limits in filtered or unfiltered samples, Costa said.
Each casting cavity contained both a test plate and a chill wedge and had a separate filter print.
Make sure they cannot get into it, or use a different kind of filter.
Members of AOL Time Warner's America Online can make use of AOL's internal Web filter.
Dust, Some units include a built-in prefilter, which can help strain large dust particles before they fill the spaces between HEPA filter fibers.
Despite filter inlet fluctuations in solids and flow rate, discharge filtrate quality has remained consistently high.
They were found to be the best filter device by a recent Consumer Reports test.
Why not have the filter delete a suspicious message?
The filter had improved the oil's viscosity, which is characteristic of fluid flow per unit time that indicates thermal degradation.
The nation's fourth largest tobacco company was so proud of its "Micronite" filter that it took out full page ads in the Journal of the American Medical Association to tout the filter's ability to remove tars and nicotine.
Conventional filter bags are the most commonly accepted method used to capture fine particulate matter for air pollution control.