In the strict sense in the law of real property, a thing or right which is like in quality to some other thing or right but different from it. An easement can be appurtenant to land, but one piece of land cannot be appurtenant to another, not one easement to another.

In modern law, the strict meaning will be disregarded if the circumstances show that the word is used in the general sense of belonging to or connect with, and its meaning will depend on the context of the document or the nature of the thing or the transaction.

Practically the same is appendant with which it is often combined as a single phrase.