senatorial

adjective

1. of, pertaining to, characteristic of, or befitting a senator or senate: senatorial oratory.
2. consisting of senators.

adjective

1. of, relating to, befitting, or characteristic of a senator
2. composed of senators
3. mainly US electing or entitled to representation by a senatorsenatorial districts

adj.1740, from French sénatorial or from Latin senatorius “pertaining to a senator” or formed in English from senator + -al (1). Earlier adjectives were senatory (1520s), senatorian (1610). Related: Senatorially.