1the amount or number of a material or abstract thing not usually estimated by spatial measurement:the quantity and quality of the fruit can be controlled
[count noun] a certain, usually specified, amount or number of something:a small quantity of foodif taken in large quantities, the drug can result in liver failure
(often quantities) a considerable number or amount of something:she was able to drink quantities of beer without degenerating into giggles [mass noun]:many people like to buy in quantity
2 Phonetics the perceived length of a vowel sound or syllable.
3 Mathematics & Physics a value or component that may be expressed in numbers.
[count noun] the figure or symbol representing a quantity.
