Advanced as in sleeping car A term used to describe someone or something that is not expected to succeed but surprises everyone by doing well, similar to the concept of a dark horse. Clear All
2 Example Sentences Showcasing the Meaning of 'Sleeper'
The rookie player turned out to be a sleeper for the team, making crucial contributions in important games.
The weary travelers booked a sleeper car on the overnight train to ensure a comfortable journey.
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