Revolution refers to a political upheaval in a government or nation state characterized by great change. It commonly describes the removal and replacement of a government, especially by sudden violent action, rotation: the turning of an object around an axis, and a rotation: one complete turn of an object during rotation, 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 in the case of celestial bodies - the traversal of one body through an orbit around another body, a sudden, vast change in a situation, a discipline, or the way of thinking and behaving, and a round of periodic changes, such as between the seasons of the year, so the category can cover literal uses, related ideas, and more figurative extensions of the same core meaning. Taken together, these meanings present Revolution 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 consideration of an idea; the act of revolving something in the mind, which reinforce how the category can stretch across adjacent but still recognizable uses of the same term.
