ordain, ordained, ordinary, ordination, planned long ago, set up, prepared, bring about, marked out

Definition:

To ordain means to formally appoint a person for a special task or role. It also means to formally make a rule or decree.

The term "ordain" often refers to formally appointing somebody as a priest, minister, or rabbi.
For example, God ordained Aaron and his descendants to be priests.
It can also mean to institute or establish something, such as a religious feast or covenant.
Depending on the context, to "ordain" could be translated as to "assign" or to "appoint" or to "command" or to "make a rule" or to "institute."