# ont

CEFR C2 · Noun

Source: https://englishreference.com/word/ont
Updated: 2026-05-08

## Definition

a prefix used in science to talk about things that exist or the nature of being. It is mostly found in academic words like ontology.

For teachers: a combining form derived from the Greek 'on' (being), used in philosophical and scientific terminology to relate to existence or the nature of being.

## Examples

- The word ontology uses the prefix ont to discuss existence.
- In philosophical debates, scholars often use terms with the ont prefix to address the fundamental nature of reality.
- While primarily found in the term ontology, the prefix ont serves as a linguistic marker for any inquiry into the categorical structure of what exists.

## Usage notes

- Used as a combining form or prefix in academic and philosophical contexts; rarely stands alone as a word in English.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.