It is a form of government in which the power is divided between a central authority and various constituent units of a country. It includes 2 or more tier (levels) of government. It is also called vertical power sharing.(1)Central government.(2)State government. (3)Local government.

It is a system of government. In which central government share it\’s with state and local government. It has two or more tier of government
In which central government divide its power to state government and state to various parts of country.
It is a system of government in which power is divided between central authority and several constituent units

Separate system to provide justice too
In which there are more than 1 level of government