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verb expand pronunciation in American English /ɪkˈspænd/
Word Forms
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present tense
I/you/we/theyexpand
he/she/itexpands
present participleexpanding
past tenseexpanded
past participleexpanded
  1. 1
    [intransitive] to become larger in size and fill more space
    The water froze inside the pipe, causing it to expand and burst.
    We live in an expanding universe.
    Synonyms and related words
  2. 2
    [intransitive] if a business, organization, or activity expands, it grows by including more people, moving into new areas, selling more products, etc.
    the rapidly expanding IT sector
    expand into: The group has expanded into Germany.
    1. a.
      [transitive] to make a business, organization, or activity do this
      We must expand our services to include training.
  3. 3
    [intransitive] to talk or write more about something, adding more details or information
    expand on/upon: I refuse to expand any further on my earlier statement.
  4. 4
    [intransitive/transitive] formal to open something that is folded
    The hawk expanded its wings and soared into the sky.
  5. 5
    [transitive] maths to write an expression in a longer form

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