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Showing results for sleeper. Search instead for sveper.
Definitions

sleeper

[slee-per] / ˈsli pər /
NOUN
dark horse
Synonyms
STRONGEST
also-ran long shot underdog
WEAK
hundred-to-one shot improbability little chance little opportunity outside chance outside shot poor bet poor lookout poor possibility poor prognosis poor prospect slim chance small chance stalking horse unexpected winner unknown unknown quantity unlikelihood unlikely winner upsetter
NOUN
late bloomer
Synonyms
WEAK
naïve person slowpoke up-and-comer
Antonyms
WEAK
child prodigy
NOUN
nightgown
Synonyms
STRONGEST
lingerie pajamas
STRONG
negligee nightdress nightie nightshirt
WEAK
PJs bedgown nightrobe
NOUN
pajamas
Synonyms
STRONG
PJ's jammies jams loungewear nightdress nightie nightshirt nightwear
WEAK
jamas lounging robe sleeping suit
NOUN
sleeping car
Synonyms
WEAK
Pullman car roomette sleeper car wagon-lit
NOUN
spy
Synonyms
STRONGEST
agent detective informer investigator mole operative secret agent secret service undercover agent
STRONG
emissary lookout observer patrol plant scout sleuth snoop spotter watcher
WEAK
double agent espionage agent foreign agent inside agent intelligencer plumber

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

Unless Snead and his scouts have identified a sleeper pick, this year’s draft class is not brimming with top quarterback prospects other than Fernando Mendoza.

From Los Angeles Times • Mar. 1, 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 sleeper muttered in his sleep as I jostled him, and he pushed my hand back down without even waking.

From "Prisoner B-3087" by Alan Gratz

Vocabulary lists containing sleeper

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