auditorial,a.|ɔːdɪˈtɔərɪəl| [f. L. audītōri-us auditory + -al1.] 1.= auditory a. 1859in Worcester.a1881[Implied in auditorially adv.]. 2. Of or pertaining to auditors of accounts; connected with an audit. 1883Manch.Guard. 12 Oct. 4/6 The auditorial investigation at the River Plate Bank.