accreditationnoun [ U ]
us/əˌkred·əˈteɪ·ʃən, -ət̬ˈeɪ·ʃən/official approval, esp. in order to maintain satisfactory standards:
The hospital was threatened with the loss of accreditation if it did not improve the quality of its care.
accredited
adjective [ not gradable ] us/əˈkred·ə·t̬ɪd/
Only accredited journalists are admitted to White House press conferences.