to show dislike or opposition in response to sth, especially by deliberately doing the opposite of what sb wants you to do :
He reacted strongly against the artistic conventions of his time.
to show dislike or opposition in response to sth, especially by deliberately doing the opposite of what sb wants you to do :
He reacted strongly against the artistic conventions of his time.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005