astronomical

US /ˌæs.trəˈnɑː.mɪ.kəl/

UK /ˌæs.trəˈnɑː.mɪ.kəl/

1.

relating to astronomy

:

•

The observatory is equipped with advanced astronomical instruments.

•

He has a deep interest in astronomical phenomena.

2.

extremely large or enormous

:

•

The cost of the new building was astronomical.

•

They faced an astronomical amount of debt.

:

enormous immense colossal gigantic massive

:

astronomer astronomical unit