1.Definition: a passenger car that has berths for sleeping

Category: Objects

2.Definition: a piece of furniture that can be opened up into a bed

Category: Objects

3.Definition: a rester who is sleeping

Related Noun(s):slumberer

Category: People

4.Definition: an unexpected achiever of success

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

Category: People

5.Definition: an unexpected hit

"That movie was the sleeper of the summer"

Category: General

6.Definition: one of the cross braces that support the rails on a railway track

"The British call a railroad tie a sleeper"

Related Noun(s):crosstie, tie

Category: Objects

7.Definition: pajamas with feet; worn by children

Category: Objects

8.Definition: tropical fish that resembles a goby and rests quietly on the bottom in shallow water

Category: Animals