deadlight (plural deadlights)
- (nautical) A strong shutter fitted over a porthole etc. that can be closed in bad weather.
- (figuratively) Eyelid.
1913, Joseph C. Lincoln, chapter 6, in Mr. Pratt's Patients:
- He had one hand on the bounce bottle—and he'd never let go of that since he got back to the table—but he had a handkerchief in the other and was swabbing his deadlights with it.