The essence of what it means to be a rock; the qualities that make a rock what it is.
2009, Robert C. Atchley, Spirituality and Aging, Johns Hopkins University Press (2009), ISBN 9780801891199, page 26:We do not have to become a rock to study rocks, but we do have to understand the nature of “rockness.â€
2011, Max Lucado, The Lucado Inspirational Reader: Hope and Encouragement for Your Everyday Life, Thomas Nelson (2011), ISBN 9780849948305, page 190:You can't impact the treeness of a tree, the skyness of the sky, or the rockness of a rock.
2011, C. Alexander Simpkins & Annellen M. Simpkins, Zen Meditation in Psychotherapy: Techniques for Clinical Practice, John Wiley & Sons (2011), ISBN 9781118159330, page 99:He asked, how can you truly know the rockness of a rock by categorizing it? Simply dividing it into smaller pieces, weighing it, and looking at its properties may tell you a great deal about what it is like, but what it is, its essence, its rockness, escapes such analysis
(slang) The quality of music being rock music, or generally "rocking" (being excitingly good).
