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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 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 ?
1 Revenue Data: Selected Filter Companies, 2012 183
Don't forget the Filters in the ANITPQ-37's signal processor and the ANITPQ-36's inverter regulator.
The one-inch see-through fiberglass filters are designed to keep rocks and sticks out of the ductwork--mainly to protect the system itself, not your lungs.
This confirms that tile inoculant filter assembly can effectively reduce the formation of iron carbides (which can accelerate tool wear and reduce the machinability of the casting) while promoting the formation of Type A graphite in a pearlitic matrix.
Most household fans are not intended to be used with a filter, which restricts airflow to some degree.
Some computers at the BPL's Central Library have privacy filters that prevent anyone other than the person in front of the monitor from viewing the screen.
Check the manufacturer's recommended replacement interval and the filter cost, as well as any shipping charge.
Since the effectiveness of filters varies based on airflow, the size of the room and of the particles to be filtered, and how quickly the filtering mechanism needs to be replaced, compare filter efficiencies before investing.
Why not have the filter delete a suspicious message?
Faced with the inherent problems of using heat transfer fluids for process heating, Twin City Die Casting decided to switch to a simple but extremely effective solution to its heat transfer system problems when it implemented Liquid Process Systems' filter to continuously filter the oil while operating their systems.
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.
com/reports/c50413) has announced the addition of the new Frost & Sullivan Report "World Harmonic Filter Markets" to their offering.
Filters are installed in a wide range of equipment and vehicles as original equipment; however, replacement (or aftermarket) demand accounts for the vast majority of filter sales.