activity meaning and definition

ACTIVITY noun

Definition of activity (noun)

1. any specific behavior
   • "they avoided all recreational activity"
   • antonym: inactivity
2. the state of being active
   • "his sphere of activity"; "he is out of action"
   • synonyms: action, activeness
   • antonym: inaction
3. an organic process that takes place in the body
   • "respiratory activity"
   • synonyms: bodily function, bodily process, body process
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: action, natural action, natural process
6. the trait of being active; moving or acting rapidly and energetically
   • "the level of activity declines with age"
   • synonyms: activeness
   • antonym: inactiveness