activity Meaning, Definition & Usage

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

WordNet

Ac*tiv"i*ty noun
Etymology
Cf. F. activité, LL. activitas.
Wordforms
plural Activities
Definitions
  1. The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities. "The activity of toil." Palfrey. Syn. -- Liveliness; briskness; quickness.

Webster 1913