A polity is a state or one of its subordinate civil authorities, such as a province, prefecture, county, municipality, city, or district. It is generally understood to mean a geographic area with a corresponding government. Thomas Hobbes considered bodies politic in this sense in Leviathan. In previous centuries, body politic was also understood to mean "the physical person of the sovereign" (in monarchies and despotisms, the emperor, king, or dictator, and, in republics, the electorate). Today, it may also refer to a representation of the ethnic or gender demographics of a region; for example, in many liberal democracies, cabinets are chosen to represent the body politic.^{[citation needed]}

The Constitution of India (Hindi: भारतीय संविधान; see also names in the other official languages) is the supreme law of India. It lays down the framework defining fundamental political principles, establishes the structure, procedures, powers, and duties of government institutions, and sets out fundamental rights, directive principles, and the duties of citizens. It is the longest written constitution of any sovereign country in the world, containing 444 articles in 24 parts, 12 schedules and 97 amendments. Besides the English version, there is an official Hindi translation. Bodhisattva Dr. Babasaheb Ambedkar[bhimrao ramji Ambedkar] is Chief Architect of Indian Constitution.

The Constitution was enacted by the Constituent Assembly on 26 November 1949, and came into effect on 26 January 1950. The date 26 January was chosen to commemorate the Purna Swaraj declaration of independence of 1930. With its adoption, the Union of India officially became the modern and contemporary Republic of India and it replaced the Government of India Act 1935 as the country's fundamental governing document. The Constitution declares India to be a sovereign, socialist, secular, democratic republic, assuring its citizens of justice, equality, and liberty, and endeavours to promote fraternity among them. The words "socialist" and "secular" were added to the definition in 1976 by constitutional amendment. India celebrates the adoption of the constitution on 26 January each year as Republic Day.