From Longman Dictionary of Contemporary Englishdirectorialdi‧rec‧to‧ri‧al /ˌdaɪrekˈtɔːriəl◂/ adjective [only before noun] relating to the work of a film or theatre director De Niro’s directorial debut
Examples from the Corpus
directorial• Not bad, for a first directorial effort.• Certainly, he broke the old directorial mould.• In a festival so studded with star directorial names, it was fascinating to discover who was up and who was down. 