First Known Use: 13th century
Dictionary
astronomy
noun as·tron·o·my \ə-ˈsträ-nə-mē\
: the scientific study of stars, planets, and other objects in outer space
plural as·tron·o·mies
Full Definition of ASTRONOMY
: the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties
See astronomy defined for English-language learners
See astronomy defined for kids
ADVERTISEMENT
Origin of ASTRONOMY
Middle English astronomie, from Anglo-French, from Latin astronomia, from Greek, from astr- + -nomia -nomy
Other Astronomy Terms
ASTRONOMIES Defined for Kids
astronomy
noun as·tron·o·my \ə-ˈsträ-nə-mē\
Definition of ASTRONOMY for Kids
: a science concerned with objects and matter outside the earth's atmosphere and of their motions and makeup
Learn More About ASTRONOMY
Browse
Next Word in the Dictionary: AstropectenPrevious Word in the Dictionary: astronomizeAll Words Near: astronomy
ADVERTISEMENT
Seen & Heard
What made you want to look up astronomy? Please tell us where you read or heard it (including the quote, if possible).