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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 ?
Content filtering turns the spammers' need to promote and sell against them by analyzing the words, phrases, structure and URLs contained within an email message to separate spam from legitimate email.
The case against placing primary reliance on the use of commercial filtering to address Internet dangers and concerns in schools is simple; often districts use this as a surrogate for education and supervision regarding Internet use.
Because of the rapid explosion of electronically transmitted documents, learning to make effective use of available filtering techniques should be a priority.
8e6 Technologies helps lift the burden felt by small or under-staffed IT departments by providing a one-source shop for standalone Internet filtering and reporting solutions.
Singlefin provides e-mail filtering, IM filtering, Web filtering, anti-virus and anti-spam without the need for any hardware or software deployments.
Attachment Filtering -- This feature blocks the ability to download files by type/extension including executables, music, video and broadband radio.
They offer the same filtering experience and safety both in and out of the network, for both Windows and Mac hardware, with both configuration and reporting still done centrally for ease of administration and management.
Today's release augments 8e6's position as a leader in delivering turnkey filtering appliances that combine serious security protection with flexible administration to meet the challenges organizations face today in establishing and enforcing Web access policies," said Eric Lundbohm, vice president of marketing at 8e6 Technologies.
Tensile and impact specimens were machined from the castings to determine whether filtering affects the castings' mechanical properties.
Many of today's best-run foundries have implemented filtering as an integral part of their operations to produce high quality, cost-competitive castings.
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