(1):
(a.) Admitting passage; capable of being penetrated by another body or substance; permeable; as, a pervious soil.
(2):
(a.) Capable of being penetrated, or seen through, by physical or mental vision.
(3):
(a.) Capable of penetrating or pervading.
(4):
(a.) Open; - used synonymously with perforate, as applied to the nostrils or birds.