The definition of a filter is something that separates solids from liquids, or eliminates impurities, or allows only certain things to pass through.(noun)
To filter is defined as to remove impurities or unwanted material, to gradually leave a place or to gradually become known.(verb)
See filter in Webster's New World College Dictionary
Origin: ME filtre < OFr < ML filtrum, feltrum, felt, fulled wool (used for straining liquors) < Gmc: see felt
Origin: Fr filtrer < the n.
See filter in American Heritage Dictionary 4
Origin: Middle English filtre
Origin: , from Old French
Origin: , from Medieval Latin filtrum
Origin: , of Germanic origin; see pel-5 in Indo-European roots.
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