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