# sleepunder

> English word · Noun

## Definitions
1. A kind of playdate, similar to a sleepover, in which a child stays at their friend's house until relatively late and then returns home.

## Etymology
From sleepover, with "over" replaced with its antonym "under".

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sleepunder