Definition of sleeper
1 : one that sleeps
2 : a piece of timber, stone, or steel on or near the ground to support a superstructure, keep railroad rails in place, or receive floor joists : stringpiece
3 : sleeping car
4 : someone or something unpromising or unnoticed that suddenly attains prominence or value the low-budget film became the summer's sleeper
5 : children's pajamas usually with feet —usually used in plural
6 chiefly British : a small earring or stud worn to keep the hole of a pierced ear from closing
7 : 2mole 4
Examples of sleeper in a Sentence
Sleepers were awakened by the sound of a loud crash.
He may turn out to be the sleeper in this year's election.
The movie was the summer's sleeper.
The movie became the sleeper hit of the summer.
Recent Examples of sleeper from the Web
There were separate sleeper cars for the men and women.
Rank-and-file members of the CIA and the NSA morphed in the popular imagination from metadata-snarfing desk jockeys to brave sleeper agents of the Deep State, bent on sinking the president’s leaky ship.
Residents speak of sleeper cells, and of former collaborators with the group who still walk among them.
After a lull of several months, sleeper cells are reawakening in the east of the city.
Mosul has witnessed two major counterattacks in recent weeks, assisted by sleeper cells in areas supposedly long cleared of the militants, an indication of the remaining challenges.
Al-Khodari told The Associated Press that IS sleeper cells set fire to houses and cars on Sunday afternoon in the Tanak neighborhood on Mosul’s far western edge.
Other likes: Pluto as a planet; Whataburger; Starburys; Juwan Evans as a draft sleeper.
Thursday was a statement day for one of the state's biggest sleepers, and everyone in attendance heard it loud and clear.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sleeper.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of sleeper
SLEEPER Defined for English Language Learners
Definition of sleeper for English Language Learners
: a person who sleeps in a particular way
: someone who is asleep
: a place or piece of furniture that can be used for sleeping
SLEEPER Defined for Kids
Definition of sleeper for Students
1 : someone that sleeps I'm a light sleeper.
2 : a railroad car with berths for sleeping
Seen and Heard
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