 A further distinction that can be made here, and which cross-cuts the theory/object distinction, is between a more narrow and a more broad conception of a physical property (see Chalmers 2015). A narrow conception counts as a physical property only those within a restricted range. On the theory conception, for example, these might the properties expressed by fundamental physics. A broader conception counts as physical property any property which is either a property in the narrow sense (a narrow physical property, as we might call it) or else bears the right kind of relation to narrow physical properties, for example, is definable in terms of them, or is grounded in them. There are lots of complications here, partly because there are different ways of restricting the narrow class, and different ways of extending such a class. Here we will understand the theory and object conceptions in a narrower rather than a broad way.