/ ˌpriːˈrekwəzɪt; NAmE / noun
[ usually sing. ] prerequisite (for / of / to sth) ( formal ) something that must exist or happen before sth else can happen or be done
SYN precondition :
A degree is an essential prerequisite for employment at this level.
—compare requisite
► pre·requis·ite adjective [ only before noun ]:
prerequisite knowledge