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Definition of "activity" []

  • The state of being active. (noun)
  • Energetic action or movement; liveliness. (noun)
  • A specified pursuit in which a person partakes. (noun)
  • An educational process or procedure intended to stimulate learning through actual experience. (noun)
  • The intensity of a radioactive source. (noun)
  • The state or quality of being active (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • Lively action or movement (noun)
  • Any specific deed, action, pursuit, etc (noun)
  • The number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second (noun)
  • The capacity of a substance to undergo chemical change (noun)
  • The effective concentration of a substance in a chemical system. The absolute activity of a substance B, λB, is defined as exp (μBRT) where μB is the chemical potential (noun)

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Use "activity" in a sentence
  • "For of what could a non-spiritual activity consist, an _activity of nature_, when we have no other knowledge of activity save as spiritual, and of spirituality save as activity?"
  • "Further, it is not the name or character of an activity which determines whether it is play for the participant, but _his attitude toward the activity_."
  • "” “Not in passivity [the passive affects], but in activity, lie the evil and the good of the rational social animal, just as his virtue and his vice lie not in passivity, but in activity” (IX."