sleeper

Word parts

sleep   -er

Pronunciation

• IPA ^(key): /ˈsliːpə/

• Audio (AU)

  (file)

Noun

Singular sleeper

Plural sleepers

1. (countable) A sleeper is a person who sleeps.
2. (countable) A sleeper is a train that carries sleeping cars.
3. (countable) A sleeper is someone or something that looks ordinary but has a secret function that will be used at a much later time.