What is the meaning of Relationship?

Connection or association; the condition of being related.

The links between the x-values and y-values of ordered pairs of numbers especially coordinates.

Kinship; being related by blood or marriage.

A romantic or sexual involvement.

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.

Source: wiktionary.org