Definition of filtered
1
: having unwanted elements (such as sediments) removed by means of a filter : subjected to filtration
filtered water
2
: made less intense, full, or pure by being partially blocked
plants that do well in filtered sunlight Adjustable slats (vanes) fit between sheets of polyester fabric, allowing a filtered view or complete privacy.— Daniel Gregory Frantic July tourist cars sent up a filtered sound and smell through the tall plane trees below the windows.— M. F. K. Fisher
3
: having a filter
filtered cigarettes A few days or perhaps weeks later, the person moves into one of the big, specially filtered rooms and starts the chemotherapy, which is tenderly called ablation.— Sallie Tisdale
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Merriam-Webster unabridged
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Time Traveler for filtered
The first known use of filtered was circa 1600
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