Collins COBUILD Advanced Learner's English Dictionary - peacekeeper

also peace-keeper (peacekeepers) 1. Peacekeepers are soldiers who are members of a peacekeeping force. There’s been much fear that the United Nations peacekeepers would be under attack in a situation like that. N-COUNT: usu pl, oft supp N 2. If you describe a country or an organization as a peacekeeper, you mean that it often uses its influence or armed forces to try to prevent wars or violent conflicts in the world. They want the United Nations to play a bigger role as the world’s peacekeeper... N-COUNT: usu sing