Newtonian refers to concepts and principles derived from the work of Isaac Newton, particularly in the field of physics. It encompasses the laws of motion and universal gravitation, which describe how objects move and interact under various forces. Newtonian mechanics is foundational to classical physics and has been instrumental in understanding the physical world. The term also signifies a framework for analyzing motion and forces that remains applicable in many everyday situations. While more advanced theories like Einstein's Relativity have expanded our understanding, Newtonian principles still provide accurate predictions for most practical scenarios involving macroscopic objects.