sleep tight

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sleep tight

Where it comes from

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

phrase

If one keeps oneself tightly bundled one will sleep warm and rest well. Sleep tight! Don't let the bedbugs bite!

interjection

A farewell said shortly before going to bed; usually said between family members or good friends. "Thank you for washing the dishes." "Goodnight, Mr Smith. "Goodnight, Miss Martin. Sleep tight." Miss Martin's door closes. Hear her light switch on. Smith locking latches on doors and windows. Turning off the faint music on the vast radio. The light out under Miss Martin's door.
Similar: sleep well

Translations

Every language

intj farewell

Español	buenas noches, duerma bien
Português	durma bem
Français	dors bien, dormez bien
Deutsch	schlaf gut, schlafen Sie gut
Italiano	dormi bene

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Cite this

MLA

"sleep tight." Wiktionary, via Micwyn, micwyn.com/word/sleep%20tight. Accessed 6 Nov. 2026.

APA

sleep tight. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/sleep%20tight

Chicago

"sleep tight." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/sleep%20tight.

BibTeX

@misc{sleep_tight_2026,
  title = {sleep tight},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/sleep%20tight},
  urldate = {2026-11-06}
}