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

illusion

an idea or belief that is not true

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More