porthole

Definition of Porthole in English :

1. porthole

a window in a ship or airplane

2. embrasure, port, porthole

an opening (in a wall or ship or armored vehicle) for firing through

WordNet Lexical Database for English. Princeton University. 2010.

Porthole

noun

1.

a small aperture in the side of a vessel to admit light and air, usually fitted with a watertight glass or metal cover, or both

. Sometimes shortened to: port

2.

an opening in a wall or parapet through which a gun can be fired; embrasure

noun

1.

an opening in a ship's side, esp. a round one for admitting light and air, fitted with thick glass and, often, a hinged metal cover

2.

an opening to shoot through, in the wall of a fort; embrasure

3.

an opening shaped somewhat like this, as in a furnace door

n.

1. Nautical A small, usually circular window in a ship's side.

2. An opening in a fortified wall; an embrasure.