The document discusses the definition of a constitution, form of government, and nation-state. A constitution establishes the basic principles and organization of a government, including the distribution of power. A form of government refers to the political institutions that organize a state's authority over its people. A nation-state derives its legitimacy from representing and governing a sovereign territorial nation.

1. The fundamental law, written or unwritten, that establishes the character of a government by defining the basic principles to which a society must conform; by describing the organization of the government and regulation, distribution, and limitations on the functions of different government departments; and by prescribing the extent and manner of the exercise of its sovereign powers.

2. A form of government , or form of state governance, refers to the set of political institutions by which a goverment of a state is organized in order to exert its powers over a body politic. Synonyms include "regime type" and "system of government". This definition holds even if the government is unsuccessful in exerting its power

3. The nation-state is a state that self-identifies as deriving its political legitimacy from serving as a sovring entity for a nation as a sovereign territorial unit. The state is a political and geo political entity; the nation is a cultural and/or ethnic entity. The term "nation-state" implies that the two geographically coincide, and this distinguishes the nation state from the other types of state, which historically preceded it.