keep up with somebody phrasal verb ( see also ↑ keep )
to write to, telephone, or meet a friend regularly, so that you do not forget each other
keep up with somebody phrasal verb ( see also ↑ keep )
to write to, telephone, or meet a friend regularly, so that you do not forget each other
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012