filter

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filter down

1. 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

1. To use a filtration device or system to remove something from something else. A noun or pronoun can be used between "filter" and "out." These noise-canceling headphones were great at filtering all the background noise out during my flight to New York. We can use this machine to filter out anything that might pollute the water sample.
2. To keep something from being known or experienced. A noun or pronoun can be used between "filter" and "out." Your job is to scan the user forum and filter out any offensive posts. You can't just filter negative feedback out from the "Reviews" page. Customers deserve to see the whole picture!
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

bozo filter

A filter that one can enable in an email account to prevent correspondence from someone irritating or obnoxious. Wow, that was rude—I'm definitely adding him to my bozo filter now.
See also: bozo, filter

filter in(to) (some place)

1. To slowly pass or diffuse into some place. The sunlight filtering into my bedroom is what eventually woke me up.
2. To slowly or gradually enter some place. There's no set start time for the event—people just filter in all day long.
See also: filter

filter (something) out of (something)

To use a filter to remove something from something else, usually a liquid. We can use this machine to filter any pollutants out of the water sample.
See also: filter, of, out

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 ?
Only filterer and scraper functional groups showed no relationship between secondary production and standing crop of leaf litter for the mixed substrates (Table 12).
Significant increases were observed only for pooled gatherers and filterers and not for individual taxa.
A House committee that reports out a bill under this rule plays the role of the filterer, with the entire House the chooser.
In impeachment proceedings of federal officials, including the president, the House assumes the role of the filterer: it is the body that draws up charges of impeachment, which require a 2/3 majority to enact.
This incremental query is what is used by the Tapestry filterer. The filterer repeatedly runs the incremental query, queues up the selected documents for delivery to users, records the time at which each query was run, waits some period of time, and then repeats this process using the recorded times as parameters to the incremental queries.
Because the filterer runs at discrete times, if documents could be removed, different users could receive different results from the same filter, depending on when the filter ran relative to document deletion.
(2003) categorised trophic groups of Chironomidae larvae as: facultative predators, shredders herbivores, collector gatherers and collector filterers.
In this food web it is assumed that FFGs act as trophic guilds with a primary food resource for each guild so that shredders utilize CPM detritus, gatherers utilize FPM detritus, scrapers utilize periphyton, and filterers utilize drift FPM (Cummins 1973).
Tested metrics were: 6 Richness Metrics-Total taxa, Family taxa, Ephemeroptera taxa, Plecoptera taxa, Trichoptera taxa, Ephemeroptera + Plecoptera + Trichoptera (EPT) taxa; 7 Composition Metrics--% Coleoptera, % Ephemeroptera, % Plecoptera, % Trichoptera, % Odonata, % Diptera and % EPT; 4 Tolerance Metrics-IBE-IOC, BMWP-CETEC, Baetidae/Ephemeroptera, EPT/Chironomidae; and 5 Trophic Metrics-% Shredders, % Collectors, % Predators, % Filterers, % Scrapers.
Filterers, for example, are not restricted to feeding on fine particulate organic matter that collects in their nets.