- the state or quality of being active: There was not much activity in the stock market today. He doesn't have enough physical activity in his life.
- a specific deed, action, function, or sphere of action: social activities.
- work, especially in elementary grades at school, that involves direct experience by the student rather than textbook study.
- energetic activity; animation; liveliness.
- a use of energy or force; an active movement or operation.
- normal mental or bodily power, function, or process.
- the capacity of a substance to react, corrected for the loss of reactivity due to the interaction of its constituents.
- Physics.
- the number of atoms of a radioactive substance that disintegrate per unit of time, usually expressed in curies.
- radioactivity.
- an organizational unit or the function it performs.
- the state or quality of being active
- lively action or movement
- any specific deed, action, pursuit, etc
- the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second
- the capacity of a substance to undergo chemical change
- the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λ B, is defined as exp (μ B RT) where μ B is the chemical potential
