in Logic, a series or order of all the predicates or attributes contained under any genus.

The school philosophers distribute all the objects of our thoughts and ideas into certain genera or classes, not so much, say they, to learn what they do not know, as to communicate a distinct notion of what they do know; and these classes the Greeks called categories, and the Latins predicaments.

Aristotle made ten categories, viz., substance, quantity, quality, relation, action, passion, time, place, situation, and habit, which are usually expressed by the following technical distich:

Arbor, sex, servos, ardore, refrigerat, uflus, Rure eras flabo, nec tunicatus ero.