ontological
Ontological (adjective) means relating to ontology — the branch of philosophy concerned with what exists and what it means for something to be. Example: “An ontological question about whether numbers exist.”
How to use ontological
Learner’s notesIn plain EnglishTo do with what actually exists.
Academic and philosophical. Rare in everyday speech.
Fill the gap
Can you complete this real example?
An _____ question about whether numbers exist.
Etymology
From Greek "ontos" (being) plus "logos" (study), via the noun ontology.