audit
1. au.dit \'o.d-*t\ n [ME, fr. L auditus act of hearing, fr. auditus, pp.] 1a: a formal or official examination and verification of an account book 1b: a methodical examination and review 2: the final report of an examination of books of account by auditors 2. audit vt 1: to examine with intent to verify 2: to attend (a course) without working for or expecting to receive formal credit