<p><strong>Noun</strong></p><ul><li>Garments, as nightgowns or pajamas, worn for sleeping or at bedtime.</li><li>An overnight stay or trip: Our daughter had an overnight at a friend's house.</li><li>Informal: A permit for overnight absence, as from a college dormitory: She had an overnight the night of the prom.</li><li>The previous evening.</li></ul><p><strong>Adjective</strong></p><ul><li>Done, made, occurring, or continuing during the night: an overnight stop; an overnight decision.</li><li>Staying for one night: A group of overnight guests.</li><li>Designed to be used on a trip or for a journey lasting one night or only a few nights.</li><li>Intended for delivery on the next day: overnight letters; an overnight package.</li><li>Valid for one night: The corporal got an overnight pass.</li><li>Occurring suddenly or within a very short time: A comedian who became an overnight sensation.</li></ul><p><strong>Verb</strong></p><ul><li>(Used without object) To have an overnight stay or trip: We'll overnight in Denver, then fly on to San Diego.</li></ul>