Sleeper

noun

'slipər

Noun

one of the cross braces that support the rails on a railway track
“the British call a railroad tie a sleeper”
Similar:CrosstieTie
Type of:BraceBracing
an unexpected achiever of success
“the winner was a true sleeper--no one expected him to get it”
Type of:AchieverSucceederWinner
an unexpected hit
“that movie was the sleeper of the summer”
Type of:HitBangStrike
a rester who is sleeping
Similar:Slumberer
Type of:Rester
tropical fish that resembles a goby and rests quietly on the bottom in shallow water
Type of:PercoideanPercoid
a passenger car that has berths for sleeping
Similar:Wagon-lit
Type of:CoachCarriage
a piece of furniture that can be opened up into a bed
Type of:Furniture
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
Type of:WreckerSaboteurSpy
pajamas with feet; worn by children
Type of:Pj'sPyjamaJammies