off
to make sth become gradually less in number, amount, degree, etc. :
They are gradually tapering off production of the older models.
off
to make sth become gradually less in number, amount, degree, etc. :
They are gradually tapering off production of the older models.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005