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activity - 7 dictionary results
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ac⋅tiv⋅i⋅ty

  [ak-tiv-i-tee]
Use activity in a Sentence
–noun, plural -ties.
1. the state or quality of being active: There was not much activity in the stock market today. He doesn't have enough physical activity in his life.
2. a specific deed, action, function, or sphere of action: social activities.
3. work, esp. in elementary grades at school, that involves direct experience by the student rather than textbook study.
4. energetic activity; animation; liveliness.
5. a use of energy or force; an active movement or operation.
6. normal mental or bodily power, function, or process.
7. Physical Chemistry. the capacity of a substance to react, corrected for the loss of reactivity due to the interaction of its constituents.
8. Physics.
a. the number of atoms of a radioactive substance that disintegrate per unit of time, usually expressed in curies.
b. radioactivity.
9. an organizational unit or the function it performs.
Origin:
1520–30; (< MF) < ML āctīvitās. See active, -ity
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ra⋅di⋅o⋅ac⋅tiv⋅i⋅ty

  [rey-dee-oh-ak-tiv-i-tee]
–noun Physics, Chemistry.
the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element.
Also called activity.

Origin:
1895–1900; radio- + activity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ac·tiv·i·ty   (āk-tĭv'ĭ-tē)   
n.   pl. ac·tiv·i·ties
  1. The state of being active.
  2. Energetic action or movement; liveliness.
    1. A specified pursuit in which a person partakes.
    2. An educational process or procedure intended to stimulate learning through actual experience.
  4. The intensity of a radioactive source.
  5. The ability to take part in a chemical reaction.
  6. A physiological process: respiratory activity.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Activity

Ac*tiv"i*ty\, 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.

Syn: Liveliness; briskness; quickness.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : activity
Spanish: actividad,
German: Aktivität,
Japanese: 活気
More Translations »

activity

The amount of relative trading volume in a security.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Main Entry: ac·tiv·i·ty
Pronunciation: ak-'tiv-&t-E
Function: noun
Inflected Form: plural -ties
1 : natural or normal function: as a : a process (as digestion) that an organism carries on or participates in by virtue of being alive b : a similar process actually orpotentially involving mental function; specifically : an educational procedure designed to stimulate learning by firsthand experience
2 : the characteristic ofacting chemically or of promoting a chemical reaction activity of a catalyst>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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activity ac·tiv·i·ty (āk-tĭv'ĭ-tē)
n.

  1. A physiological process.
  2. The presence of neurogenic electrical energy in electroencephalography..
  3. An ideal concentration for which the law of mass action will apply perfectly.
  4. The intensity of a radioactive source.
  5. The ability to take part in a chemical reaction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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