1 noun influential person/thingceannródaí masc4 c m uthe great arbiter of fashionceannródaí mór an fhaisinhe was an arbiter of good tastebhí cáil na cuibhiúlachta air2 noun official judgeeadránaí masc4 c m ubreitheamh masc1 c m uwho's the ultimate arbiter?cé aige a bhfuil an focal deiridh?