1. a strong shutter or cover that can be placed over a ship’s porthole or window for protection during storms
Usage: nautical
2. a thick glass window set into a ship’s deck or side to let light into lower areas
Usage: nautical

Examples

• The crew secured the deadlights before the hurricane hit.
• Heavy seas forced them to close all deadlights on the lower deck.
• The deadlight in the cabin floor provided natural lighting below.
• Storm shutters and deadlights protected the ship’s windows.
• The thick glass deadlight was designed to withstand heavy weather.
• They installed new deadlights to improve visibility in the hold.