American Heritage® Dictionary of the English Language, Fourth Edition
- n. An overnight party in which guests, usually girls, wear nightclothes, socialize, and spend the night at a friend's home.
- n. an overnight party of girls who dress in nightclothes and pass the night talking
“You got the sense that she had an idea of a lively household and that the slumber party and the ketchup-covered knife were all a part of that idea.”
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