Definitions
1.nounA 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.nounAn indefinite amount of something."Olive oil can be used practically in any quantity."
3.nounA specific measured amount."Generally it should not be used in a quantity larger than 15 percent."
4.nounA 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.nounProperty of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
6.nounIndicates that the entire preceding expression is henceforth considered a single object."x plus y quantity squared equals x squared plus 2xy plus y squared."