auditor

US /ˈɑː.də.t̬ɚ/
UK /ˈɑː.də.t̬ɚ/
"auditor" picture
1.

a person who conducts an official financial inspection of a company or individual's accounts

:
The company hired an independent auditor to review their financial statements.
As an auditor, her job is to ensure financial accuracy and compliance.
2.

a person who listens, especially to a lecture or broadcast

:
The professor addressed the auditors in the lecture hall.
She attended the class as an auditor, not for credit.