An understanding between entities to follow a specific course of conduct.
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.
A legally binding contract enforceable in a court of law.
A state whereby several parties share a view or opinion; the state of not contradicting one another.
A way in which two or more people behave and are involved with each other
The level or degree of affinity between keys, chords and tones.
The links between the x-values and y-values of ordered pairs of numbers especially coordinates.
Connection or association; the condition of being related.
Kinship; being related by blood or marriage.
A romantic or sexual involvement.