1. sleeper - noun
· a rester who is sleeping
Synonym(s): slumberer
Hypernym(s): rester
2. sleeper - noun
· a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal
Hypernym(s): spy, undercover_agent, saboteur, wrecker, diversionist, terrorist
3. sleeper - noun
· an unexpected achiever of success; "the winner was a true sleeper--no one expected him to get it"
Hypernym(s): achiever, winner, success, succeeder
4. sleeper - noun
· one of the cross braces that support the rails on a railway track; "the British call a railroad tie a sleeper"
Synonym(s): tie, railroad_tie, crosstie
5. sleeper - noun
· a passenger car that has berths for sleeping
Synonym(s): sleeping_car, wagon-lit
Hypernym(s): passenger_car, coach, carriage
6. sleeper - noun
· pajamas with feet; worn by children
Hypernym(s): pajama, pyjama, pj%27s, jammies
7. sleeper - noun
· a piece of furniture that can be opened up into a bed
Hypernym(s): furniture, piece_of_furniture, article_of_furniture
8. sleeper - noun
· tropical fish that resembles a goby and rests quietly on the bottom in shallow water
Synonym(s): sleeper_goby
Hypernym(s): percoid_fish, percoid, percoidean
9. sleeper - noun
· an unexpected hit; "that movie was the sleeper of the summer"
Hypernym(s): hit, smash, smasher, strike, bang
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