Definicija: The functional means by which the managers of an entity receive an assurance from internal sources that the processes for which they are accountable are operating in a manner which will minimise the probability of the occurrence of fraud, error or inefficient and uneconomic practices. It has many of the characteristics of external audit but may properly carry out the directions of the level of management to which it reports.

Definicija: Notranja revizija je funkcionalna rešitev (služba, oddelek ...), ki jo vzpostavi organizacija sama v okviru pristojnosti svoje najvišje hierarhične ravni. Njene funkcije so med drugim preverjanje, vrednotenje ter spremljanje ustreznosti in učinkovitosti ureditve računovodstva, notranjega kontroliranja, preprečevanje prevar in korupcije ter pridobivanja zagotovila, da procesi delujejo v skladu s temi načeli. Čeprav ima večino enakih značilnosti kot zunanja revizija, pa praviloma deluje po usmeritvah vodstva, kateremu poroča.

Definicija: Assistance provided by internal auditors when they are assigned to assist us in performing substantive tests and tests of controls under our direct supervision

Definicija: Pomoč, ki jo zunanji revizor dobi od notranjih revizorjev, ko ti pod njegovim nadzorom in usmeritvijo podrobno preizkušajo podatke.

Definicija: It's main mandate is to provide the North Atlantic Council and the governments of NATO member countries with assurance that common funds have been properly used for the settlement of authorised expenditure.

Definicija: An international and independent body which aims at promoting the exchange of ideas and experience between Supreme Audit Institutions in the sphere of public financial control.

Definicija: Mednarodni, neodvisni organ, ki si prizadeva pospeševati izmenjavo mnenj in izkušenj med posameznimi VRI na področju nadzora nad javnimi financami.