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Definition of 'activity'


  1. any specific behavior; "they avoided all recreational activity"
       Antonyms: inactivity
  2. the state of being active; "his sphere of activity"; "he is out of action"
       Synonyms: action activeness
       Antonyms: inaction inactivity inactiveness inaction inactivity inactiveness inaction inactivity inactiveness
  3. an organic process that takes place in the body; "respiratory activity"
       Synonyms: bodily process body process bodily function
  4. (chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity"
  5. a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
       Synonyms: natural process natural action action
  6. the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age"
       Synonyms: activeness
       Antonyms: inactiveness inactivity inertia

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