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Definition of energy

energy

/ˈɛn.ər.dʒi/
en · er · gy

Adverb:energetically
•
Plural:energies
•
Adjective:energetic
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energy Lexical Profile

energy Game Scores & Validity

• noun

1

The strength, vitality, and enthusiasm required for sustained physical or mental activity.

Example

"After a full night of sleep, she had plenty of energy to finish painting the house."


2

Usable power derived from physical or chemical resources, such as fossil fuels, solar radiation, or wind, utilized to provide light, heat, or work.

Example

"The country is investing heavily in solar and wind energy to reduce carbon emissions."


3

In physics, the quantitative property of a physical system that gives it the capacity to do work or produce heat, existing in kinetic, potential, thermal, electromagnetic, and other forms.

Example

"According to the law of conservation of energy, the total energy of an isolated system remains constant over time."


4

A person's physical and mental powers or efforts, typically applied toward a specific goal or task (usually used in the plural).

Example

"He devoted all his energies to reforming the local education system."

Synonyms
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Antonyms
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• Rhymes for energy

Word Origin & Etymology

Borrowed in the late 16th century from Middle French 'énergie', from Late Latin 'energia', and ultimately from Ancient Greek 'energeia' (activity, operation), coined by Aristotle from 'en-' (in, within) and 'ergon' (work).

Cite this Entry


Wordmom. (2026). Definition of Energy. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/energy
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