peacekeeping Syllabification: (peace·keep·ing)Pronunciation: /ˈpēsˌkēpiNG/Translate peacekeeping | into Italian | into Spanish Definition of peacekeeping noun [usually as modifier] the active maintenance of a truce between nations or communities, especially by an international military force:the 2,300-strong UN peacekeeping forceDerivatives peacekeeperPronunciation: /-ˌkēpər/ noun peacekeeping in other Oxford dictionaries Definition of peacekeeping in the British & World English dictionary