Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “sleeper”

See all translations

sleeper

noun uk   /ˈsliː.pər/ us    /-pɚ/

sleeper noun (PERSON)

a good/heavy/light sleeper someone who sleeps in the stated way: I'm a light sleeper - the slightest noise wakes me. You won't wake him - he's such a heavy sleeper.

sleeper noun (ON TRAIN)

acarriage in a train with beds for passengers to sleep in, or one of the beds in this carriage, or the type of train that has these carriages: I'm travelling overnight so I've booked a sleeper. The 11.45 to Venice is a sleeper.

sleeper noun (BLOCK)

[C] UK ( US railroad tie) one of the heavy horizontal blocks that supports a railway track

sleeper noun (RING)

[C] UK a small gold or silver ring that is worn in a pierced ear (= one that has a hole in it) to stop the hole from closing while other earrings are not being worn

sleeper noun (SUDDEN ACTIVITY)

[C] a person or thing that is suddenly and surprisingly successful after a long period of not achieving anything [C] a spy who only becomes active a long time after being put in place by an organization or country
(Definition of sleeper from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of sleeper?
Add Cambridge dictionaries to your browser to your website

Definitions of “sleeper” in other dictionaries

Word of the Day

glacial

made or left by a glacier

Word of the Day

Let’s celebrate! (words and phrases for parties)

by Kate Woodford,
December 17, 2014
​​​ With Christmas and New Year almost upon us, we thought it a good time to look at the language of parties and celebrations. First, let’s start with the word ‘party’ itself. To have or throw a party or, less commonly, to give a party is to arrange a party: We’re having a

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More