available to be used in the future or when needed :
The money was being kept in reserve for their retirement.
200 police officers were held in reserve .
available to be used in the future or when needed :
The money was being kept in reserve for their retirement.
200 police officers were held in reserve .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005