Physics refers to a medicine or drug, especially a cathartic or purgative. It commonly describes the art or profession of healing disease; medicine, natural philosophy; physics, and a physician, which gives the term a broader and more practical sense than a single short definition would suggest. Depending on context, it can also point to the branch of science concerned with the study of the properties and interactions of space, time, matter and energy, the physical aspects of a phenomenon or a system, especially those studied scientifically, and to cure or heal, so the category can cover literal uses, related ideas, and more figurative extensions of the same core meaning. Taken together, these meanings present Physics as a flexible theme rather than a narrowly technical label, covering the central idea people usually mean when they use the word while still leaving room for closely related senses that appear in real language. Additional shades of meaning include to administer medicine to, especially a purgative, which reinforce how the category can stretch across adjacent but still recognizable uses of the same term. Physics therefore works well as a quotation category because it can hold direct statements about the subject, figurative uses that borrow its meaning, and broader reflections that stay anchored to the same central idea.
