Objective reality

Objective reality is what is really real. It is reality as it truly exists, independent of any consciousness (minds) perceiving it. If a tree falls down in the forest, barring any abnormal atmospheric conditions, it makes a sound, even if no one is there to hear it. What does not occur in this scenario is the phenomenon of hearing (or at least not human hearing; most likely there would be other organisms capable of some form of sound detection within earshot).

Different beings perceive reality differently; probably each individual viewpoint is in some way unique. However, objective reality is what exists on the outside of the mind, beyond you perceiving it. Regardless of what the ultimate essence or nature of reality actually is, one can be sure that they (their consciousness) themselves are a part of that higher reality (existence); unless solipism is true (and YOU are the one mind that contains it all; not a likely truth, however; the odds are at least several billion to one).