category

Meanings

1. 1
   noun

   A group, often named or numbered, to which items are assigned based on similarity or defined criteria.

   This steep and dangerous climb belongs to the most difficult category.

2. 2
   noun

   A collection of objects, together with a transitively closed collection of composable arrows between them, such that every object has an identity arrow, and such that arrow composition is associative.

   One well-known category has sets as objects and functions as arrows.

3. 3
   noun

   a general concept that marks divisions or coordinations in a conceptual scheme

4. 4
   noun

   a collection of things sharing a common attribute

Etymology

Etymology tree Proto-Indo-European *ḱe Proto-Indo-European *ḱóm Proto-Indo-European *ḱm̥-th₂der.? Proto-Hellenic *kətá Ancient Greek κᾰτᾰ́ (kătắ) Ancient Greek κᾰτᾰ- (kătă-) Proto-Indo-European *h₂ger- Proto-Indo-European *h₂goréh₂ Proto-Hellenic *agorā́ Ancient Greek ᾰ̓γορᾱ́ (ăgorā́) Ancient Greek -εύς (-eús) Ancient Greek -εύω (-eúō) Ancient Greek ἀγορεύω (agoreúō) Ancient Greek κᾰτήγορος (kătḗgoros) Proto-Indo-European *-eti Proto-Indo-European *-eyéti Proto-Indo-European *-esyéti Proto-Indo-European *-éh₁ti Proto-Indo-European *-yeti Proto-Indo-European *-éh₁yeti Proto-Indo-European *-yeti…