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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

#nofilter

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

v.
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

v.
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

v.
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 ?
Don't forget the Filters in the ANITPQ-37's signal processor and the ANITPQ-36's inverter regulator.
I've heard more than one homeowner say that it seems like their filter takes forever to get dirty.
Rather than naively recomputing all of the filters, Diamond uses a smart hashing technique to identify the binary filters that have changed between two searches and reuses whatever computation that it can.
With the proven benefits, recent developments have focused on combining the two techniques--placing the inoculant inside the filter, which then is placed within the gating system.
We have found an inexpensive way to filter home air to remove dust, pollen, pet dander, and other particles.
Even after it lost its challenge of CIPA, the ALA demanded that Web filter creators be explicit about what is blocked and what criteria are being used.
It is argued that local control has been retained because the school district has selected the categories to be blocked and can override the filter to provide access.
All HEPA filters capture particles of this size, while electrostatic filters generally do not.
The PETAX pressurized disc filter system was the only filtration technology that met all the application requirements, according to Bobell.
Electric filters create an electrically charged field or ionize particles to trap them more effectively.
Another potential issue with filters is that they can slow down mail processing.
The cost of pump repair and labor was estimated at $700 per pump per breakdown, but now the filters are said to have increased pump life by three times its normal life.
In the fifties, as the medical community reported more and more about the hazards of smoking, tobacco companies rushed to put filters on cigarettes to show that they were doing something about the problem.
In a standard manufacturing plant, PulsePleat filters last four times longer than standard filters.