adj.
Pronunciation: ˌ as-tr ə - ' nä-mi-k ə l
Variant: also as · tro · nom · ic \ -mik \
Function: adjective
Date: 1556
1 : of or relating to astronomy < astronomical observations>
2 : enormously or inconceivably large or great < astronomical numbers>
– as · tro · nom · i · cal · ly \ -mi-k( ə -)l ē \ adverb