( BrE ) ( NAmE for all intents and ˈpurposes )
in the effects that sth has, if not in reality; almost completely :
By 1981 the docks had, to all intents and purposes, closed.
The two items are, to all intents and purposes, identical.
TO ALL INTENTS AND PURPOSES
Meaning of TO ALL INTENTS AND PURPOSES in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005