Cast or directed downward: as, a downcast eye or look.Hence Depressed; dejected: as, a down-cast spirit.In mining, descending.n. A downward look: generally implying sadness or pensiveness.n. In mining, the ventilating shaft down which the air passes in circulating through a mine.n. In ship-building, a duct or trunk with a cowl or hood at its upper end, arranged to drive air down into the interior of a vessel.