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The Collaborative International Dictionary of English v.0.48 (gcide)

Pervious \Per"vi*ous\, a. [L. pervis; per via a way. See
{Per-}, and {Voyage}.]
1. Admitting passage; capable of being penetrated by another
body or substance; permeable; as, a pervious soil.
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[Doors] . . . pervious to winds, and open every way.
--Pope.
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2. Capable of being penetrated, or seen through, by physical
or mental vision. [R.]
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God, whose secrets are pervious to no eye. --Jer.
Taylor.
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3. Capable of penetrating or pervading. [Obs.] --Prior.
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4. (Zool.) Open; -- used synonymously with {perforate}, as
applied to the nostrils or birds.
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