n.

1. 量[U]
   Mathematics is the science of pure quantity.

   数学是研究纯量的科学。

2. 数量；分量[C][（+of）]
   There is a small quantity of water left in the bottle.

   瓶子里还剩下少量的水。

3. 大量，大宗[C][P1][（+of）]
   She has quantities of good clothes.

   她有许多好衣服。

4. 【语】（元音，音节等的）音量[U]
5. 【数】量[U]
6. 【逻】（命题的）量[U]

n.

1. a certain amount or number.
   ▸a considerable number or amount.
2. the property of something that is measurable:
   wages depended on quantity of output, regardless of quality.
3. Phonetics  the perceived length of a vowel sound or syllable.