From Longman Dictionary of Contemporary Englishpeacemakerpeace‧mak‧er /ˈpiːsmeɪkə $ -ər/ noun [countable] PEACE/NO WARsomeone who tries to persuade other people or countries to stop fighting The US sees itself as a peacemaker in the region.
Examples from the Corpus
peacemaker• The U.S. sees itself as a peacemaker in the region.• His test as a peacemaker is still ahead of him.• We know how to teach other women to do it too, to leverage their natural expertise as peacemakers.• She was constantly interceding as peacemaker between her son, Alfonso, and his father.• As Christians, we have the privilege of serving the Prince of Peace, and we have the responsibility to be peacemakers.• He was a natural fighter and a born peacemaker.• The peacemakers are marked by fanatics on both sides for protests, resistance and even assassination.• The Bible not withstanding, peacemakers are targeted, not blessed, in today's Middle East. 