sleeper

/slˈipɚ/ · 2 syllables

Meaning

noun

a rester who is sleeping
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
an unexpected achiever of success
“the winner was a true sleeper--no one expected him to get it”
one of the cross braces that support the rails on a railway track
“the British call a railroad tie a sleeper”
a passenger car that has berths for sleeping
pajamas with feet; worn by children
a piece of furniture that can be opened up into a bed
tropical fish that resembles a goby and rests quietly on the bottom in shallow water
an unexpected hit
“that movie was the sleeper of the summer”

Developers: get definitions, synonyms, antonyms, rhymes and pronunciation for 147,000 words as JSON with the English Dictionary API (free trial).