powerhouse - definition and synonyms

noun [countable] informal 

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/ˈpaʊə(r)ˌhaʊs/
singularpowerhouse
pluralpowerhouses
  1. 1
    a person or thing that has a lot of strength or energy

    The Internet is becoming a commercial powerhouse.

  2. 2
    something such as a country or organization that has a lot of power or influence