( BrE ) ( NAmE go off on a ˈtangent )
( informal ) to suddenly start saying or doing sth that does not seem to be connected to what has gone before
( BrE ) ( NAmE go off on a ˈtangent )
( informal ) to suddenly start saying or doing sth that does not seem to be connected to what has gone before
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005