Latin. n. Ditch, trench, channel, moat. - English law. A ditch full of water, where formerly women who had committed a felony were drowned; the grave.
- n. pl. FossÆ (Anat.) A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossæ containing the nostrils in most birds.