- main deck
- nounthe uppermost sheltered deck that runs the entire length of a large vessel• Syn: ↑second deck• Hypernyms: ↑deck
* * *noun: the principal deck of a ship:a. : the highest complete deck on a naval vessel extending the full length and width of the shipb. : the deck next below the upper or the shelter deck on a merchant ship usually located at the end of the transverse framing; often : the uppermost continuous deck so constructed that it is possible to close securely all openings — see deck illustration, ship illustration
* * *Naut.the uppermost weatherproof deck, running the full length of a ship.[1740-50]
Useful english dictionary. 2012.