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

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Renewable energy is always a great word to know.
So is ninnyhammer. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
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
The long time period necessary to make renewable energy king isn't an excuse to
  ignore the need.
Sunlight, wind, and waves aren't the only sources of renewable energy.
As a renewable energy, pig oil has great environmental benefits.
Hence its interest in solar power, as well as other sources of renewable
  energy, such as wind turbines.
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