1.
to come very close to being sth, especially a strong or unpleasant emotion or quality :
She felt an anxiety bordering on hysteria.
2.
to be next to sth :
areas bordering on the Black Sea
1.
to come very close to being sth, especially a strong or unpleasant emotion or quality :
She felt an anxiety bordering on hysteria.
2.
to be next to sth :
areas bordering on the Black Sea
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005