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boom

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noun boom pronunciation in British English /buːm/ 
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singularboom
pluralbooms
  1. 1
    [countable/uncountable] economics a sudden major increase in trade, profits etc in a particular country or region

    the economic boom of the 1980s

    boom years

    1. a.
      [countable] a similar increase in the activity of a particular industry or part of a country's economy

      an export/investment/house-building boom

      boom in:

      The island is experiencing a boom in tourism.

    See also  baby boom
  2. 2
    [countable] a sudden increase in the popularity of something

    the aerobics boom of the 1980s

    boom in:

    the recent boom in all kinds of counselling and therapy

  3. 3
    [countable] [usually singular] a deep loud sound that continues for some time, for example the noise of thunder or an explosion
    Synonyms and related words for this sense of boom

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