to reduce or get rid of the differences that exist between two things or groups of people
BRIDGE THE GAP / GULF / DIVIDE (BETWEEN A AND B)
Meaning of BRIDGE THE GAP / GULF / DIVIDE (BETWEEN A AND B) in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005