1. to maintain or continue a relationship, friendship, or connection with someone
We try to keep up relations with our old friends even after moving to a different city.
Tentamos manter relações com nossos velhos amigos mesmo depois de nos mudarmos para outra cidade.
2. to sustain diplomatic, business, or social connections between parties
The two countries have decided to keep up relations despite their political differences.
Os dois países decidiram manter relações apesar de suas diferenças políticas.