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 ?
Old air filters should be replaced regularly, as often as monthly depending on the air surrounding your home.
These filters take one to for review from Snapchat and the company won't review it until you pay for the filter.
Upon removal, found a two-inch-long piece of material in filter outlet, which appears to be the edge of a gasket.
With linear phase filters (filters with a constant group delay), by multiple filter using, it is possible to realize such amplitude change functions as to make improvements in stop-band, pass-band or in both.
Although the deviation between the results from the two filters can be calculated as Fig.
The frequency at which you should change your furnace filter depends on the number of people who live in the home; how many furry pets reside indoors; the presence of smoke from tobacco, woodstoves or other sources; how dusty the environment is; the type of furnace filter; and the thickness of the filter.
With the emergence of prophylactic filter indications, the number of retrievable filters placed has increased.
Wet filters rely primarily on the oil to trap the dust particles and other contaminates, while a dry filter uses the filter fibers to trap contaminates, as most traditional air filters are designed to do.
In variable volumes systems, the additional resistance in loaded filters often means the system must increase fan's speed to maintain desired airflow rates.
WesTech Engineering recently introduced a Rotary Table Vacuum Filter and Ceramic Disc Filter.
In this paper, before presenting new models of coupled transmission lines it is necessary to present and analyze the general method of designing band-pass filters. According to the general method of designing band-pass filters in [1], using the template of integrated elements, first a low pass filter is designed and then the equivalent band-pass filter which uses coupled transmission lines will be designed and analyzed.
The Hi-line elements are all manufactured to ISO 8573-1:2010 with a pleated media construction which provides more than four times the filtration area than conventional wrapped or rolled media filters. In addition they ensure less oil carry-over, with longer service life and lower differential pressure.
A/C Filters 4 Less is a family owned and operated business providing excellent customer service since 1980.
Figure 1 shows the layout of conventional and proposed square bandpass filters [3].
The use of filters with juice lees has been a worldwide standard for many years.