Added 10 October 2026 all-night /ˌɔlˈnaɪt/ adjective Categories: Describing Words In Latin: pernox Wiktionary adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about all-night at Wordnik → Where our words come from → Lasting, open, or operating through the whole night. a nightlong vigil Related Words: overnightround-the-clocknightlongall-dayaround-the-clockeverlastinghours-longseasonlonglong-pendingevergoingweekslong Back to today's word