expand

/ɪkˈspænd/
verb
  1. To become larger in size, volume, or quantity.
    • The city's population has expanded rapidly over the last decade.
    • The balloon expanded as we filled it with air.
    • When you heat metal, it expands.
  2. To increase the range, scope, or extent of something.
    • She wants to expand her knowledge of history by reading more books.
    • The company plans to expand its business into Asia.
    • We need to expand our menu to attract more customers.
  3. To express something in fuller or more detailed form.
    • The author expanded the short story into a full novel.
    • Could you expand on your idea for the project?
    • He expanded his notes into a complete report.