Rarification n. : See Rarefaction.

Example:


Taxonomy
constitution, treaty ratification, treaty, international treaty, member states, free encyclopedia, the European Union, referendums, government, legislature, the United States Constitution, Application, the European Parliament, democracies, European Constitution, the constitution of the United States, country, parliaments.

Defination from the web:
Ratification is the act of approving and paying for supplies or services provided to and accepted by the government as a result of an ... In the UK, treaty ratification is a Royal Prerogative, exercised by Her Majesty's Government, ...