SLEEPER

Definition of SLEEPER

(noun)a rester who is sleeping
(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
(noun)an unexpected achiever of success
(noun)one of the cross braces that support the rails on a railway track
(noun)a passenger car that has berths for sleeping
(noun)pajamas with feet; worn by children
(noun)a piece of furniture that can be opened up into a bed
(noun)tropical fish that resembles a goby and rests quietly on the bottom in shallow water
(noun)an unexpected hit