means A person who works to end conflict and bring about reconciliation between opposing parties.

from A transparent English compound of 'peace' and 'maker,' joining the Latin-rooted 'peace' (from 'pax,' via Old French 'pais') to the homegrown 'maker.' It appears in English from the 15th century, and was famously elevated in the Sermon on the Mount — 'Blessed are the peacemakers' — in the early English Bible translations, which lodged the word firmly in the language. Later, with grim irony, 'Peacemaker' became a nickname for various weapons, including the Colt revolver, on the logic that overwhelming force keeps the peace.