Sleeper (Tribe album) definition

(1) An unexpected hit

"That movie was the sleeper of the summer"

(2) Tropical fish that resembles a goby and rests quietly on the bottom in shallow water

(3) A piece of furniture that can be opened up into a bed

(4) Pajamas with feet; worn by children

(5) A passenger car that has berths for sleeping

(6) One of the cross braces that support the rails on a railway track

"The British call a railroad tie a sleeper"

(7) A rester who is sleeping

(8) An unexpected achiever of success

"The winner was a true sleeper--no one expected him to get it"

(9) 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