1. a person, organization, or thing having great energy, strength, or power
2. a building that contains machinery for generating electric power

Examples

• Germany is an economic powerhouse in Europe.
• She’s a powerhouse on the basketball court.
• The tech company became a powerhouse in the industry.
• The old powerhouse by the river still generates electricity.
• Our team captain is a real powerhouse.
• The powerhouse was built in the 1920s to serve the growing city.
• That small country is a powerhouse in renewable energy.