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activity noun (activities) 1 the state of being active or busy. 2 (often activities) something that people do, especially for pleasure, interest, exercise, etc. 3 physics the rate at which the atoms of a radioactive substance disintegrate per unit of time.
ETYMOLOGY: 16c: from Latin activitas.
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The Chambers Dictionary (13th edition)
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The Chambers Thesaurus
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Chambers Biographical Dictionary
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Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.
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