Formal and Prescribed

Formal adjective - Being in accord with established forms and conventions and requirements (as e.g. of formal dress).

Prescribed is a synonym for formal in official topic. In some cases you can use "Prescribed" instead an adjective "Formal", when it comes to topics like established, ceremonial.

Nearby Words: form, formality, formalize, formalise, formative

Prescribed adjective - Formally laid down or imposed.

Formal is a synonym for prescribed. You can use "Formal" instead an adjective "Prescribed".

Nearby Words: prescription, prescriptive, prescribing