Ratification – within the Parliamentary Law in many legal systems this is a formal act by the legislative body. It is a positive sanction that accepts for internal usage in the country, concrete internationally created major legal rules. For example, contracts, concluded by members of the European Union, are a subject of such procedure in each country-member. Once done, these may apply in its internal legislation.
To “ratify” literally means to make acceptive. Or to make (a document) adoptive.
Example: “Ratification of the contract, signed between the two countries, will be voted in the Parliament on Tuesday”.