# cosmology

/kɔzˈmɔɫədʒi/ (US) · /kɒzmˈɒlədʒi/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/cosmology
Updated: 2026-05-18

## Definition

the study of the universe and how it began. It also refers to a specific set of beliefs about the universe and how it works.

For teachers: the branch of astronomy dealing with the origin and evolution of the universe. It also refers to a system of beliefs concerning the nature of the universe and the relationship between its parts.

## Examples

- Modern cosmology explains how the universe expanded after the Big Bang.
- The ancient Greeks developed early cosmology to explain why the stars moved across the night sky.
- Advances in observational technology have allowed modern cosmology to map the distribution of dark matter across the cosmos with unprecedented precision.

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