overnighter

plural overnighters

1. A person who overnights, or stays overnight.

   1981, Lou Sullivan, personal diary, quoted in 2019, Ellis Martin, Zach Ozma (editors), We Both Laughed In Pleasure I was totally unprepared (my "padding," my apartment) for an overnighter, but I invited him.

   1 more example

   Meanwhile, wildlife tourism has turned Knepp into a successful business that employs more people than it did when it was a farm. Springtime overnighters snuggling down in a luxury treehouse after a soak in the open-air, wood-fired Swedish Hikki bathtub may hear nightingales serenading their consorts

   2020 February 25, Christopher de Bellaigue, “The end of farming?”, in The Guardian

2. Something that serves overnight travel, such as a night train.
3. informalA stay or event that takes place overnight.

   1 more example

   To tackle the narrative challenge of Cave’s extreme isolation (for most of the winter he’s confined to a tiny hut, lacking even the sun for solace), Harding populates his solitude through reveries of his marriage to a Danish woman, whose pregnancy and calamitous labor make his own ordeal look, at least for a while, like an overnighter in the Adirondacks.

   2007 March 11, Steven Heighton, “Survivor”, in New York Times