Definition of astronomical adjective from the Oxford Advanced American Dictionary

     

    astronomical

     adjective
    adjective
    NAmE//ˌæstrəˈnɑmɪkl//
     
     
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  1. 1connected with astronomy astronomical observations
  2. 2(also astronomic) (informal) (of an amount, a price, etc.) very large the astronomical costs of land for building The figures are astronomical.
astronomically
 
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NAmE//‑kli//
 
adverb Interest rates are astronomically high.
See the Oxford Advanced Learner's Dictionary entry: astronomical

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