Definition of "quantity" in English

noun

1. A fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.

   • You have to choose between quantity and quality.

2. An indefinite amount of something.

   • Some soap making oils are best as base oils, used in a larger quantity in the soap, while other oils are best added in a small quantity.
   • Olive oil can be used practically in any quantity.

3. A specific measured amount.

   • This bag would normally cost $497.50 for a quantity of 250, at a price of $1.99 per piece.
   • Generally it should not be used in a quantity larger than 15 percent.

4. A considerable measure or amount.

   • The Boeing P-26A was the first all-metal monoplane fighter produced in quantity 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.

   • x plus y quantity squared equals x squared plus 2xy plus y squared.

7. (phonology) Length of sounds.