Topic: COMPANIES
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ex‧pan‧sion W3

1 [uncountable and countable] when something increases in size, range, amount etc [= growth; ↪ expand]
2 [uncountable and countable] when a company, business etc becomes larger by opening new shops, factories etc [↪ expand]:
The industry underwent a period of rapid expansion.
The industry underwent a period of rapid expansion.3 [countable] an idea, story etc that is based on one that is simpler or more general :
The novel is an expansion of a short story he wrote about forty years ago.
The novel is an expansion of a short story he wrote about forty years ago.