What is the meaning of Appurtenance?

That which appertains; an appendage to something else; an addition.

Equipment used for some specific task; gear.

A subordinate interest in land which benefits a principal estate, which cannot be detached from or held separately to that estate; an appurtenant interest.

A modifier that is appended or prepended to another word to coin a new word that expresses belonging.

The state or quality of being an appurtenance.

Source: wiktionary.org