activity

noun

1. any specific behavior

   noun.act

   Examples

   They avoided all recreational activity.

   Antonyms inactivity

   Source: WordNet 3.0

2. the state of being active

   noun.state

   Examples

   His sphere of activity.

   Synonyms action activeness

   Antonyms inaction inactiveness inactivity

   Source: WordNet 3.0

3. an organic process that takes place in the body

   noun.process

   Examples

   Respiratory activity.

   Synonyms bodily function bodily process body process

   Source: WordNet 3.0

4. (chemistry) the capacity of a substance to take part in a chemical reaction

   noun.state

   Examples

   Catalytic activity.

   Source: WordNet 3.0

5. a process existing in or produced by nature (rather than by the intent of human beings)

   noun.process

   Examples

   Volcanic activity.

   Synonyms action natural action natural process

   Source: WordNet 3.0

6. the trait of being active; moving or acting rapidly and energetically

   noun.attribute

   Examples

   The level of activity declines with age.

   Synonyms activeness

   Antonyms inactiveness inactivity inertia

   Source: WordNet 3.0

7. The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human <i>activities</i>.

   noun

   Source: webster1913