What is Reality?

Trying to explain reality is like trying to explain the color blue. You know its blue and everyone else agrees its blue, but how do you know others see blue the way you do.

Reality is commonly defined as a thing that is actually experienced or seen. The vagueness of this definition shows the openness of what reality really is.

 How do I know that everything around me is not a working part of my imagination, or better yet, how do you know that I am not a figment of yours? This uncertainty means there is no true definition of what reality is. 

Just like we all agree on the color blue being blue, it can be generally concurred that what reality is a collection of ideas that the vast majority of creatures (in our case humans) believe to be true based upon discovered facts or experiences.