kom-pan′yun, n. (naut.) the skylight or window-frame through which light passes to a lower deck or cabin: companion-ladder.—ns. Compan′ion-ladd′er, the ladder or stair leading from the deck to the officers cabin; Compan′ion-way, a staircase from the deck to a cabin. [Cf. Dut. kompanje; O. Fr. compagne; It. compagne.]