sleep tight

English

Etymology

The word tight is sometimes explained as here meaning “well, soundly”.[1] However, it can just as well be interpreted in its literal sense of “firm, fast”; compare fast asleep.

Phrase

sleep tight

  1. If you keep yourself tightly bundled you will sleep warm and rest well.

Interjection

sleep tight

  1. (nightly farewell) good night

See also

Translations

References
  1. https://en.oxforddictionaries.com/explore/what-is-the-origin-of-the-phrase-sleep-tight
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