send off (for sth) | ˌsend aˈway (to sb) (for sth)
to write to sb and ask them to send you sth by post / mail :
I've sent off for some books for my course.
send off (for sth) | ˌsend aˈway (to sb) (for sth)
to write to sb and ask them to send you sth by post / mail :
I've sent off for some books for my course.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005