in the form of a letter, document, etc. (that gives proof of sth) :
All telephone reservations must be confirmed in writing.
Could you put your complaint in writing ?
You must get it in writing .
in the form of a letter, document, etc. (that gives proof of sth) :
All telephone reservations must be confirmed in writing.
Could you put your complaint in writing ?
You must get it in writing .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005