renewable energy

noun
any naturally occurring, theoretically inexhaustible source of energy, as biomass, solar, wind, tidal, wave, and hydroelectric power, that is not derived from fossil or nuclear fuel.
Also called soft energy.


Origin:
1970–75

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
renewable energy
 
n
another name for alternative energy

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Dictionary.com's 21st Century Lexicon
Main Entry:  renewable energy
Part of Speech:  n
Definition:  See alternate energy
Main Entry:  renewable energy
Part of Speech:  n
Definition:  See renewable resource
Dictionary.com's 21st Century Lexicon
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Example sentences
Following the collapse of the ballyhooed solar firm, these are dark times for
  renewable energy.
Renewable energy sources, such as solar and wind, generate power without
  depleting natural resources in the process.
Scientists say they have produced clean, renewable energy from the contents of
  a cow's stomach.
Waterpower remains the nation's largest source of clean, domestically produced,
  renewable energy.
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