Synonym: cleanse, drain, percolate, purify, refine, screen, separate, sift, strain. Similar words: filtering, alter, shelter, alternative, fail to, built up, svelte, file. Meaning: ['fɪltə(r)] 
n. 1. device that removes something from whatever passes through it 2. an electrical device that alters the frequency spectrum of signals passing through it. v. 1. remove by passing through a filter 2. pass through 3. run or flow slowly, as in drops or in an unsteady stream.
n. 1. device that removes something from whatever passes through it 2. an electrical device that alters the frequency spectrum of signals passing through it. v. 1. remove by passing through a filter 2. pass through 3. run or flow slowly, as in drops or in an unsteady stream. 
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31. The best prevention for cholera is to boil or filter water, and eat only well-cooked food.
32. The crankcase has to drain before you put on the new filter.
33. The child was able to filter out the noises surrounding him, as he was so busy in his play.
34. At this time of day you need to filter out the red light to take a good photo.
35. If the filter has been saturated with motor oil, it should be discarded and replaced.
36. Marge liked the coffee that his filter pot made.
37. These packages are dedicated filter design programs.
38. I was very surprised when, following a phosphate surge in my tapwater, I used a phosphate-removing compound in my filter.
39. Carbon dioxide and other unwanted exhaled gases are sucked away through ceiling pendant into filter cleaner.
40. Beneficial anaerobic filter bacteria require oxygen to oxidise nitrites to safer nitrates.
41. Today's forward thinking manufacturers are already offering systems which include self-washing filter units and energy efficient airflow patterns.
42. Every time you make a long distance telephone call, your voice is processed through an adaptive filter.
43. It looked like a blaze photographed with a filter that transformed everything into shades of the same colour.
44. Others claim to aid the filter process by breaking down the detritus helping filter bacteria to get to work.
45. In many companies, stated corporate values and policies do not filter down to the day-to - day actions of the firm.
46. Although not as extensive in its filter design as some of the above, it is still an impressive product.
47. This effect was created by the clever use of a pink filter.
48. Set up a biological filter and circulate your pondwater through it about once every two hours with a suitable pump.
49. F Filter bacteria: Almost every natural substance can be broken down by bacteria. and fish wastes are no exception.
50. These firms know what the local law is, and could filter some Internet content as demanded by it.
51. The whole consignment, Carmichael says, must filter down into as many pairs of hands as possible.
52. It appears to have done so this time only after reports of the blast began to filter out through international news agencies.
53. When they are exhaled they are filtered through the white crystals of soda lime, and a bacterial filter.
54. The filter was constructed as shown in the diagram and then stood on the wooden crosspieces on top of the vat.
55. Slum dwellers would filter through into better stock,(http://sentencedict.com/filter.html) or be rehoused by local authorities in new estates.
56. The remains of the air filter system was fitted facing the rear bulkhead.
57. The constitutional and organizational arrangements filter the interests of state personnel towards the long-run interests of the capitalists.
58. Antibiotics will. of course, kill all bacteria, including beneficial kinds in the filter, whether this is undergravel or not.
59. At least one of the new filter starting bacteria mixes claims to allow you to start your tank fully stocked.
60. IC2 is used as the buffer stage in the active lowpass filter ahead of the delay line.