An ~ activity or organization is done or formed only because a situation has made it necessary and is not planned in advance.
The Council meets on an ~ basis to discuss problems.
ADJ: usu ADJ n
An ~ activity or organization is done or formed only because a situation has made it necessary and is not planned in advance.
The Council meets on an ~ basis to discuss problems.
ADJ: usu ADJ n
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012