- a round, windowlike opening with a hinged, watertight glass cover in the side of a vessel for admitting air and light.Compare port4(def 1).
- an opening in a wall, door, etc., as one through which to shoot.
Origin of porthole
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for porthole
He looked up through the porthole and saw, perfectly framed, the Acropolis.Remembering the Man Who Brought Jaws—and Me—to the Shelves
December 23, 2008
A porthole, with the black heavens and the blazing stars, was before her.
He looked around the fixed cabin and out the porthole at the unmoving stars.Death Wish
He lowered a tender gaze on his banjo and I went on looking through the porthole.Some Reminiscences
He stood there, looking out the porthole, and forgot I was there.The Stoker and the Stars
Algirdas Jonas Budrys (AKA John A. Sentry)
"You were right about the porthole, Robert," I said, and I gave him the promised sovereign.The Upper Berth
Francis Marion Crawford
- a small aperture in the side of a vessel to admit light and air, usually fitted with a watertight glass or metal cover, or bothSometimes shortened to: port
- an opening in a wall or parapet through which a gun can be fired; embrasure
Word Origin and History for porthole
Online Etymology Dictionary, © 2010 Douglas Harper