Recreation, or activities of leisure
Recreation is an activity of leisure, leisure being discretionary time.
The Aristotelian concept of energeia, Latinized as actus
In philosophy, potentiality and actuality are a pair of closely connected principles which Aristotle used to analyze motion, causality, ethics, and physiology in his Physics, Metaphysics, Nicomachean Ethics and De Anima, which is about the human psyche.
Activity, the rate of catalytic activity, such as enzyme activity, in physical chemistry and enzymology
Thermodynamic activity, the effective concentration of a solute for the purposes of mass action
In chemical thermodynamics, activity is a measure of the "effective concentration" of a species in a mixture, in the sense that the species' chemical potential depends on the activity of a real solution in the same way that it would depend on concentration for an ideal solution.
"Activity", a song by Way Out West from Intensify
Intensify is the second studio album by English electronic music duo Way Out West, released on 20 August 2001 by Distinct'ive Records.
Activity, a board game by Piatnik & Söhne