during or for the night 在晚上; 在夜里: stay overnight at a friend's house, ie sleep there for the night 在朋友家过夜. 
(infml 口) suddenly or very quickly 突然; 很快: She became a celebrity overnight. 她一下子成了名人了.> overnight / 5EUvEnaIt; `ovL`naIt/ adj [attrib 作定语]
1 during or for the night 晚上的; 夜里的: an overnight journey 夜间旅行 * an overnight bag 装过夜用品的旅行袋 * an overnight stop in Rome 在罗马停留一夜.
2 (infml 口) suddenly; very quickly 突然的; 很快的: an overnight success 突然间的成功.