[1] : The Collaborative International Dictionary of English v.0.48

activity \activ"ity\, n.; pl. activities. cf. f.
   activit'e, ll. activitas.
   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.
   1913 webster

   syn: liveliness; briskness; quickness.
        1913 webster
see also:
activities 

[2] : WordNet (r) 2.0

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

[3] : Moby Thesaurus II by Grady Ward, 1.0

172 moby thesaurus words for "activity":
   act, acting, action, actions, activism, activities, acts,
   actuation, address, affair, affairs, affectation, air, animation,
   ardor, artificial radioactivity, bag, bearing, behavior,
   behavior pattern, behavioral norm, behavioral science, brio,
   briskness, business, bustle, campaign, carriage, cause, commerce,
   commitment, comportment, concern, concernment, conduct,
   contamination, crusade, culture pattern, curiage, custom,
   decontamination, demeanor, deportment, doing, doings, drive,
   dynamics, elan, employ, employment, endeavor, energy, enterprise,
   enthusiasm, exercise, exercising, exertion, faith, fallout,
   folkway, function, functioning, gestures, glow, going, goings-on,
   great cause, guise, gusto, half-life, impetuosity, impetus,
   interest, issue, job, joie de vivre, kinematics, kinesipathy,
   kinesis, kinesitherapy, kinetics, labor, life, lifework,
   liveliness, lookout, lustiness, maintien, manner, manners,
   mass movement, matter, method, methodology, methods, mettle, mien,
   mobilization, modus vivendi, motion, motions, motivation, move,
   movement, movements, moves, moving, natural radioactivity,
   nuclear radiation, observable behavior, occupation, operation,
   operations, pattern, perkiness, pertness, play, poise, port, pose,
   posture, practice, praxis, presence, principle, procedure,
   proceeding, project, pursuit, radiant energy, radiation,
   radioactive radiation, radioactivity, radiocarbon dating,
   radiolucency, radiopacity, radiosensibility, radiosensitivity,
   reason for being, restlessness, robustness, running,
   saturation point, service, social science, specific activity,
   spirit, spiritedness, stir, stirring, style, swing, tactics, thing,
   tone, undertaking, unrest, velocity, venture, vigor, vim, vivacity,
   vocation, warmth, way, way of life, ways, work, working, workings,
   zest, zestfulness

Activity >> A Words
Activity, definition of term: Activity
activity_pag1.html

Sexual Activity >> S Words
Sexual Activity, definition of term: Sexual Activity
sexual+activity_pag1.html