Definition

A person or thing that sleeps, often used to refer to a sleeping car on a train or a type of fish that lies still in water.

Example

The sleeper on the train was comfortable and allowed us to rest during our journey.

Conversation

Have you ever traveled on a sleeper train?

Yeah, I did once, and it was such a unique experience!

I bet! I heard the sleeper cars are really comfortable for long trips.

They are! I actually slept better than I expected.

Synonyms & Antonyms

Root Explanation

Sleeper → It is formed from "sleep" (from Old English *slæpan*, meaning to rest or be in a state of sleep) and "-er" (meaning a person who). A sleeper is a person who is in a state of sleep.

Memory Tip

Think of someone who is 'resting' ('sleep') — the '-er' just means a person. A sleeper is someone who is resting.

Visually Confused Words