con·sti·tu·tion
ˌkänstəˈt(y)o͞oSH(ə)n/
noun
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a body of fundamental principles or established precedents according to which a state or other organization is acknowledged to be governed.
synonyms: charter, social code, law; bill of rights;rules, regulations, fundamental principles“the constitution guarantees our rights”
A Constitution has three main functions. First it creates a national government consisting of a legislative, an executive, and a judicial branch, with a system of checks and balances among the three branches. Second, it divides power between the federal government and the states.