To sort or arrange things into specific groups based on what they have in common.
From Greek kategoria (predicate, category) via Medieval Latin and French, with the verbal suffix -ise (British) or -ize (American). The meaning is 'to place into a category.'
Every time you organize your phone apps into folders or tag social media posts, you're doing what Aristotle formalized over 2,000 years ago—the human impulse to categorise is so fundamental that computers had to learn it from us.
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