noun
That which appertains; an appendage to something else; an addition.
(in the plural) Equipment used for some specific task; gear.
(law) A subordinate interest in land which benefits a principal estate, which cannot be detached from or held separately to that estate; an appurtenant interest.
(grammar) 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.