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Definitions

sleeper

[slee-per] / ˈsli pər /


NOUN
late bloomer
Synonyms
Antonyms






Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"This suggests that dreaming may reshape how brain activity is interpreted by the sleeper: the more immersive the dream, the deeper the sleep feels."

From Science Daily • Mar. 26, 2026

“This was a sleeper issue that people did not pay much attention to before the pandemic. Then things got extremely intense,” Saver said.

From Salon • Jan. 9, 2026

He previously played a KGB sleeper agent in The Americans, for which he won an Emmy Award for his acting in 2018.

From BBC • Jan. 2, 2026

The track’s metaphorical meaning — comparing his own flawed behavior in relationships to a “mutt” or a dog with good intentions — along with a sensual bassline and knocking drums eventually became a sleeper hit.

From Los Angeles Times • Dec. 18, 2025

Again and again she hoped for a glimpse of the sleeper, but it had only happened once, and she accepted that it would probably never be allowed again.

From "The Amber Spyglass" by Philip Pullman