n.[C]

1. 種類；部屬；類目
   The strings are a category of musical instruments.

   弦樂器是樂器的一種。

2. 【數】範疇，類型
3. 【哲】範疇
   Time, place, quantity and quality are categories.

   時、空、質、量都是範疇。

n.

1. a class or division of people or things having particular shared characteristics.
2. Philosophy  each of a possibly exhaustive set of classes among which all things might be distributed.
   ▸each of the a priori conceptions applied by the mind to sense impressions.