Definition of infrastructure noun from the Oxford Advanced American Dictionary

  

infrastructure

 noun
noun
NAmE//ˈɪnfrəˌstrʌktʃər//
 
[countable, uncountable]
 
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the basic systems and services that are necessary for a country or an organization to run smoothly, for example buildings, transportation, and water and power supplies
infrastructural
 
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NAmE//ˌɪnfrəˈstrʌktʃərəl//
 
adjective [usually before noun] infrastructural development
See the Oxford Advanced Learner's Dictionary entry: infrastructure