sen·a·to·ri·al \|senə|tōrēəl, -tȯr-\adjective Etymology: Latin senatorius of a senator (from senator + -ius -y) + English -al 1. a.: of, relating to, or befitting a senator or a senate < senatorial office > < senatorial voice > < senatorial dignity > < senatorial rank > b.: composed of senators < the Roman senatorial order > 2.: administered by the Roman senate rather than by the emperor < a senatorial province >