to try to become friendly with someone again after you have offended them or argued with them:
Is it too late to mend fences with your ex-wife?
end a quarrel
[transitive]to end a quarrel or difficult situation by dealing with the problem that is causing it:
I've tried to mend matters between us, but she's still very angry.
WORD CHOICE: WORD CHOICE: repair, fix, mendRepairis slightly more formal than fixor mend. You canrepairanything that is broken or damaged, or has a hole in it• He repairs old furniture.• It cost too much to get the car repaired.• The roof needs repairing in a few places. In British English, fix and mend have the same meaning, but people more often use fix to talk about repairing a machine, vehicle etc and mendto talk about repairing holes in clothes, roads, roofs, and fences.In American English, mend is usually only used to talk about repairing things with holes in them, especially clothes and shoes. ➔ See alsorepair
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.