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Definition of astronomy

astronomy

/əˈstrɑːnəmi/
as · tron · o · my
Adverb:astronomically
•
Plural:astronomies
•
Adjective:astronomical
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astronomy Lexical Profile

astronomy Game Scores & Validity

• noun

1

The branch of natural science that studies celestial objects, space, and the physical universe as a whole.

Example

"Her childhood fascination with the night sky eventually led her to pursue a degree in astronomy."

Synonyms
View all synonyms for astronomy

Word Nuance & Usage

Should not be confused with 'astrology', which is a non-scientific divinatory system that claims celestial positions influence human affairs, whereas 'astronomy' is the empirical scientific study of space.

• Rhymes for astronomy

• Nearby Words

astronomic
astronomical
astronomically
astronomy
astrophysical
astrophysicist
astroturf

Word Origin & Etymology

Borrowed via Old French and Latin from Ancient Greek 'astronomia', a compound of 'astron' (star) and '-nomia' (arranging, regulating, or law).

Cite this Entry

Wordmom. (2026). Definition of Astronomy. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/astronomy
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