A
vizier (, rarely ; ;
Wazeer, , , ,
Vazeer; sometimes spelled
vazir,
vizir,
vasir,
wazir,
vesir, or
vezir) is a high-ranking political advisor or minister. The
Abbasid caliphs gave the title
wazir to a minister formerly called
katib (secretary) who was at first merely a helper, but afterwards became the representative and successor of the
dapir (official scribe or secretary) of the
Sassanian kings.