to allow sb not to follow the usual rule on one occasion :
Children are not usually allowed in, but I'm prepared to make an exception in this case.
to allow sb not to follow the usual rule on one occasion :
Children are not usually allowed in, but I'm prepared to make an exception in this case.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005