Skip to the word

Added 10 October 2026

astronomy

/əˈstɹɒn.ə.mi/ noun

In Latin: astrologia, astronomia Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about astronomy at Wordnik → Where our words come from →

The branch of physics that studies celestial bodies and the universe as a whole.

Origin

From Middle English astronomie, astronemy, from Old French astronomie, equivalent to astro- + -nomy. Displaced native Old English tungolcræft.

From Wiktionary, via Kaikki.org (CC BY-SA)

Back to today's word