[ UK /æktˈɪvɪti/ ]
[ US /ækˈtɪvəti, ækˈtɪvɪti/ ]
  1. the state of being active
    his sphere of activity
    he is out of action
  2. the trait of being active; moving or acting rapidly and energetically
    the level of activity declines with age
  3. a process existing in or produced by nature (rather than by the intent of human beings)
    volcanic activity
    the action of natural forces
  4. any specific behavior
    they avoided all recreational activity
  5. (chemistry) the capacity of a substance to take part in a chemical reaction
    catalytic activity
  6. an organic process that takes place in the body
    respiratory activity
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How To Use activity In A Sentence

  • The outside activity is monitored through a battery-operated thermo sensor, which can be placed 30m away from the main unit. Times, Sunday Times
  • Cattle seem to absorb less radioactivity than sheep, except for the milk, which is to be avoided at all costs because of the iodine.
  • The fifth position went to a phishing activity, in which a university hacker stole Internet users' personal information by luring them to provide confidential data on disguised Web sites.
  • Still, for the medium term, either the government needs to scutinize refinery activity much more closely, adopt new regulatory authority and aggressively enforce antitrust laws, or it must intervene to deconcentrate the market. Robert Weissman: What To Do About the Price of Oil
  • The supplementary motor area has shown increased activity during learning of new movements.
  • With cross-sectional data it is not possible to make precise comparisons between changes in employment and economic activity over time.
  • For 10,000,000 years during the Miocene, Pliocene and Pleistocene epochs this area was a fiery inferno of constant volcanic activity and magnificent giants such as the Grizaba, La Malinche, Iztaccihuatl, Popocatepetl, Volcan de Toluca and Volcan de Colima, along with thousands of smaller volcanic cones, came into eruptive existence. The geology and geography of Lake Chapala and western Mexico
  • Although I have finally been given a small piece of work to do (nothing crucial, generous deadline), I'm finding it hard to apply myself after such a long period of enforced inactivity.
  • Taurine, a sulfur-containing amino acid, has been reported to have antihypertensive and sympatholytic activity.
  • It was the hub of activity in milk delivery and milk churns were a feature of every station.
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