Definition of "dynamo" []

• A generator, especially one for producing direct current. (noun)
• An extremely energetic and forceful person: a vice president who was the real dynamo of the corporation. (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 dynamo is a modern four-pole machine, compound-wound, with a rated output of 46 amperes, at 125 volts -- in other words a dynamo of 5.75 kilowatts capacity, or 7.7 electrical horsepower."
• "In other Siriano news, the pint-sized designing dynamo is eagerly awaiting the fall debut of his new shoe line, which will be available exclusively at Payless."
• "And standing atop that podium for the women's 5,000 meters in speedskating was a 22-year-old dynamo from the Czech Republic who also seems destined to be a history-maker."