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English definition of “expand”

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expand

verb [I/T]  /ɪkˈspænd/ us  
to increase something in size, number, or importance: [I] The air in the balloon expands when heated. [T] They expanded their number of stores significantly in the 1990s.
expansion
noun [U]  /ɪkˈspæn·ʃən/ us  
Expansion into new areas of research might be possible.
(Definition of expand from the Cambridge Academic Content Dictionary © Cambridge University Press)
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