Definition

A type of window or cover that is designed to let in light but cannot be opened, often used on ships to prevent water from entering.

Example

The ship's deadlight was securely fastened to keep the cabin dry during the storm.

Conversation

Have you ever noticed the deadlight on the boat?

Yeah, I saw it last time we went out on the water.

It really helps keep the cabin dark during the day.

Definitely! It's a smart way to avoid the heat.

Synonyms & Antonyms

Root Explanation

Deadlight is formed from "dead" (from Old English *dead*, meaning no longer alive) and "light" (from Old English *leoht*, meaning illumination or brightness). The term "deadlight" refers to a light that is no longer functioning or a window that cannot be opened, metaphorically suggesting a lack of life or activity.

Memory Tip

Think of something that is 'no longer alive' ('dead') and 'illuminating' ('light') — a deadlight is a light that has ceased to function.

Visually Confused Words