Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun alternative_energy

1 sense of alternative energy

Sense 1
alternative energy -- (energy derived from sources that do not use up natural resources or harm the environment)
       => energy, free energy -- ((physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms")