ontology
C1CEFR level
65/100Rarity: rare
TechnicalRegister
General noun
The branch of metaphysics concerned with the nature of being and what kinds of things exist.
Whether numbers are real objects or useful fictions is a classic question of ontology.
Business noun
A formal specification of concepts and the relationships between them within a domain.
The data team built an ontology so that 'active user' meant exactly the same thing across every report.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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