Definition of expansion noun from the Oxford Advanced American Dictionary

  

expansion

 noun
noun
NAmE//ɪkˈspænʃn//
 
[uncountable, countable]
 
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an act of increasing, or making something increase, in size, amount, or importance a period of rapid economic expansion Despite the recession, the company is confident of further expansion. The expansion of higher education will continue. The book is an expansion of a series of lectures given last year.
See the Oxford Advanced Learner's Dictionary entry: expansion

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