1. mend fences - Verb
2. mend fences - Phrase
mend fences (third-person singular simple present mends fences, present participle mending fences, simple past and past participle mended fences)
(idiomatic) To repair damage to a friendship or relationship after a disagreement or other mishap.
I don't think he was very happy with my work, so I'm going to talk to him and try to mend fences.