arbiterar·bi·ter /ˈɑːbɪtəˈɑːrbɪtər/ noun [countableC]1HUMAN RESOURCESa person or organization with the authority to decide how something should be doneThe Food and Drug Administration is the final arbiter of food labeling.
2ORGANIZATIONSHUMAN RESOURCESJOBa person or organization that tries to find solutions to disagreementsBusinessmen here often hire freelance arbiters to settle disputes.