An ~ event was not planned to happen, but happens unexpectedly or because someone changes their plans at a late stage.
...an ~ meeting with Robin Cook...
The ship made an ~ stop at Hawaii.
ADJ: usu ADJ n
An ~ event was not planned to happen, but happens unexpectedly or because someone changes their plans at a late stage.
...an ~ meeting with Robin Cook...
The ship made an ~ stop at Hawaii.
ADJ: usu ADJ n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012