sleeper

definition: an unexpected hit
example: that movie was the sleeper of the summer
speech part: noun
synonyms:
definition: tropical fish that resembles a goby and rests quietly on the bottom in shallow water
example:
speech part: noun
synonyms: sleeper goby
definition: a piece of furniture that can be opened up into a bed
example:
speech part: noun
synonyms:
definition: pajamas with feet
example:
speech part: noun
synonyms:
definition: a passenger car that has berths for sleeping
example:
speech part: noun
synonyms: sleeping car wagon-lit
definition: one of the cross braces that support the rails on a railway track
example: the British call a railroad tie a sleeper
speech part: noun
synonyms: tie railroad tie crosstie
definition: a rester who is sleeping
example:
speech part: noun
synonyms: slumberer
definition: an unexpected achiever of success
example: The winner was a true sleeper--no one expected them to get it.
speech part: noun
synonyms:
definition: 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
example:
speech part: noun
synonyms:

sleeper is explained and pronounced

How sleeper is being used?