1.NounA strong (often wooden) shutter fitted over a porthole, that can be closed in bad weather to keep water out and discourage the glass windows from breaking.
2.NounA deck prism, a device to allow light into the cabin of boat through the deck.
3.NounAn eye.
4.NounAn eyelid.
5.NounThis term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.