to help sb in a disagreement or difficult situation :
A local businessman stepped in with a large donation for the school.
The team coach was forced to step in to stop the two athletes from coming to blows.
to help sb in a disagreement or difficult situation :
A local businessman stepped in with a large donation for the school.
The team coach was forced to step in to stop the two athletes from coming to blows.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005