The notion of objectivity entails that certain things exist independently from the mind, or that they are at least in an external sphere.
Objective truths are independent of human wishes and beliefs.
The notion of objectivity is especially relevant to the status of our various ideas, and the question is to what extent objectivity is possible for thought, and to what extent it is necessary. In metaphysics, Plato identifies objectivity as pertaining to the world of the forms. For Plato, the forms reside in a separate world, which is invisible to our sense, although obtainable through reason. Philosophers of the modern period concede the reality of the objective realm, although argue that it is unattainable. This is so of Locke's account of the a thing's substance, and Kant's view that our knowledge is restricted to the phenomenal realm, with no direct access to things in themselves.