A legally binding contract enforceable in a court of law.
Rules that exist in many languages that force some parts of a sentence to be used or inflected differently depending on certain attributes of other parts.
An understanding between entities to follow a specific course of conduct.
A state whereby several parties share a view or opinion; the state of not contradicting one another.
A formal agreement between two parties, especially between a church and a state; specifically, an agreement between the Pope and a government.