What does "geothermal energy" mean?

Heat under the ground used to heat water and make steam to turn generator turbines and make electricity.

Geothermal energy

Common synonyms include: direct heat use, direct use geothermal energy, earth heat, earth heat energy, earth science heating, geothermal engineering.

noun

noun ·Rare ·Advanced level

Noun

1
Heat under the ground used to heat water and make steam to turn generator turbines and make electricity. uncountable
2
energy derived from the heat in the interior of the earth wordnet