Noun
The quality of being active; nimbleness; quickness of motion; activity.
Source: Webster's dictionaryIt's a very strange middle class...Full of operators and people on the move. It really doesn't value disruptions in that activeness. It doesn't have time for any privileging of daydreaming. Amit Chaudhuri
his sphere of activity Source: Internet
he is out of action Source: Internet
the level of activity declines with age Source: Internet