Definition of metropolis noun from the Oxford Advanced Learner's Dictionary

 

metropolis

 noun
noun
BrE BrE//məˈtrɒpəlɪs//
 
; NAmE NAmE//məˈtrɑːpəlɪs//
 
 
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a large important city (often the capital city of a country or region) Barcelona has all the amenities you would expect to find in a great metropolis. Word Origin late Middle English (denoting the see of a metropolitan bishop): via late Latin from Greek mētropolis ‘mother state’, from mētēr, mētr- ‘mother’ + polis ‘city’.
See the Oxford Advanced American Dictionary entry: metropolis