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quantity

From Wiktionary, the free dictionary

English

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EnglishWikipedia has an article on:
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Etymology

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FromMiddle Englishquantite, fromOld Frenchquantité, fromLatinquantitās(“quantity”), fromquantus(“how much”).

Pronunciation

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Noun

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quantity (countable anduncountable,pluralquantities,abbreviationqty)

  1. Afundamental,genericterm used when referring to themeasurement (count, amount) of ascalar,vector, number of items or to some other way ofdenominating the value of a collection orgroup ofitems.
    Coordinate terms:entity,property,trait,characteristic;dimension,magnitude,measure,measurement,size,amount,degree,value
    You have to choose betweenquantity and quality.
    • 1999, Arnošt Kotyk, “Introduction”, inQuantities, Symbols, Units, and Abbreviations in the Life Sciences: A Guide for Authors and Editors, Humana Press,→ISBN:
      A few comments on the words used in the title of the book and on some related expressions are necessary. A "quantity" is here understood in the sense of "a thing that has the property of being measurable in dimensions, amounts, etc., or in extensions of these which can be expressed in numbers and symbols" (Webster's New World Dictionary of [the American Language], Third Edition, 1988), or of "something having magnitude, or size, extent, amount, and the like" (Random House Webster's College Dictionary, 1991;The New Hamlyn Encyclopaedic World Dictionary, 1988). It is interesting that up to the 1950s a "quantity" was defined as what we now describe as "magnitude" (e.g., the unabridgedWebster's New International Dictionary, 1948, gives examples of a sphere's surface being aquantity, its area a magnitude, or a yardstick being aquantity, its length a magnitude). This practice is now obsolete and at present length is aquantity, its numerical value its magnitude.
  2. An indefinite amount of something.
    Some soap making oils are best as base oils, used in a largerquantity in the soap, while other oils are best added in a smallquantity.
    Olive oil can be used practically in anyquantity.
  3. A specific measured amount.
    This bag would normally cost $497.50 for aquantity of 250, at a price of $1.99 per piece.
    Generally it should not be used in aquantity larger than 15 percent.
  4. A considerable measure or amount.
    The Boeing P-26A was the first all-metal monoplane fighter produced inquantity for the U.S. Army Air Corps.
  5. (metrology) Property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
  6. (mathematics) Indicates that the entire preceding expression is henceforth considered a single object.
    xplusyquantity squared equalsx squared plus2xy plusy squared.
  7. (phonology)Length ofsounds.

Usage notes

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  • In mathematics, used to unambiguouslyorate mathematical equations; it is extremely rare in print, since there is no need for it there.

Derived terms

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Related terms

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Translations

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fundamental, generic term used when referring to the measurement
indefinite amount of something
specific measured amount
considerable measure or amount
word used to indicate that preceding expression is a single object
The translations below need to be checked and inserted above into the appropriate translation tables. See instructions atWiktionary:Entry layout § Translations.
Translations to be checked

See also

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Further reading

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