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The definition of activity

5 Definitions of: activity

    1. noun, the state or quality of being active
    2. noun, lively action or movement
    3. noun, any specific deed, action, pursuit, etc
    4. noun, the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second
    5. noun, a) the capacity of a substance to undergo chemical change b) the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λB, is defined as exp (μBRT) where μB is the chemical potential
    6. Show me some examples of this word: activity
    7. Show me the etymology of the word: activity
Synonyms: exercise, work, life, enterprise, energy, active, occupation, endeavour, animation, action And more...
Antonyms: inaction
 

From Collins

©HarperCollins 2008. Collins English Dictionary definition of activity