Energeia is a term derived from ancient Greek, meaning "activity" or "operation." It refers to the concept of energy in a philosophical context, particularly in the works of Aristotle. Energeia describes the realization of potential, where something exists in a state of active engagement or functioning. In modern usage, energeia relates to various fields, including physics and metaphysics. It emphasizes the dynamic aspect of energy, contrasting with dynamis, which signifies potential energy or the capacity to act. This distinction helps in understanding how energy manifests in different forms and processes in the universe.