Definition of "powerhouse" []

• See power plant. (noun)
• One that possesses great force or energy: She is an editorial powerhouse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The social-networking powerhouse is a couple weeks away from unfurling new privacy settings that let users control who sees each piece of content they post to their profile."
• "ConAgra's plan to create a private-label powerhouse comes as cash-strapped consumers, battered by high unemployment and rising gasoline prices, are looking for ways to save money."
• "The supposed powerhouse is one of just two divisions in the NFL without a single team with a winning record."