[syn: activeness, activity]
The Collaborative International Dictionary of English v.0.48:
Activeness \Ac"tive*ness\, n.
   The quality of being active; nimbleness; quickness of motion;
   activity.
   [1913 Webster]
WordNet (r) 3.0 (2006):
activeness
    n 1: the state of being active; "his sphere of activity"; "he is
         out of action" [syn: action, activity, activeness]
         [ant: inaction, inactiveness, inactivity]
    2: the trait of being active; moving or acting rapidly and
       energetically; "the level of activity declines with age"
       [syn: activeness, activity] [ant: inactiveness,
       inactivity, inertia]