Definition of “astronomical” - English Dictionary

“astronomical” in American English

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astronomicaladjective

us /ˌæs·trəˈnɑm·ɪ·kəl/

astronomical adjective (LARGE)

extremely large:

The costs were astronomical.

astronomical adjective (OF OBJECTS IN SPACE)

[ not gradable ] connected with astronomy:

astronomical observations

(Definition of “astronomical” from the Cambridge Academic Content Dictionary © Cambridge University Press)