Definition of "powerhouse"

The new powerhouse comprised two tube turbines with a total capacity of 4,500 kW under 18.3 feet head.

1986, Donald R. Froelich, S. K. Wagner, Fourth International Symposium on Hydro Power Fluid Machinery

The Soviet Union often led the world in the Olympics during the Cold War, and East Germany was an Olympic powerhouse — though athletes from both are now believed to have been systematically and massively doped […]

2016 August 25, Fareed Zakaria, “What the Olympics reveal about the world”, in The Washington Post‎

While the California economy maintains its powerhouse status, outranking even those of most countries, the state’s most-powerful sectors — including tech companies and supply chain logistics — have struggled to keep their footing, pummeled by high interest rates, investor skittishness, labor strife and other turmoil.

2023 April 11, Kurtis Lee, “California Economy Is on Edge After Tech Layoffs and Studio Cutbacks”, in The New York Times‎

A hand like A-2-3-4 is a powerhouse in Omaha/8, because it can easily make the best low hand and capture half the pot.

2011, Richard D. Harroch, Lou Krieger, Poker For Dummies