Meaning of deckhouse

deck•house

Pronunciation: (dek'hous"), [key]
— pl. -hous•es
  1. any enclosed structure projecting above the weather deck of a vessel and, usually, surrounded by exposed deck area on all sides. Cf. superstructure (def. 4).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.