/fohk"seuhl, fawr"kas'euhl, -kah'seuhl, fohr"-/ , n. Naut.
1. a superstructure at or immediately aft of the bow of a vessel, used as a shelter for stores, machinery, etc., or as quarters for sailors.
2. any sailors' quarters located in the forward part of a vessel, as a deckhouse.
3. the forward part of the weather deck of a vessel, esp. that part forward of the foremast.
Also, fo'c's'le, fo'c'sle .
[ 1300-50; ME forcastel. See FORE-, CASTLE ]