Entry 1 sense Webster, 1913 Supervisory /so͞opˌ-ẽrv-īz'-ẽr-ē/ · Su·per·vi·so·ry · IPA /sˌuːpərvˈaɪzəriː/ 01 a. Of or pertaining to supervision; as, supervisory powers. 1. Of or pertaining to supervision; as, supervisory powers.