Meaning of sleeper

Definition of sleeper

(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"

Other information on sleeper

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