Phrase guide

conservation of energy

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

a principle stating that energy may not be created or destroyed

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: law of conservation of energy, first law of thermodynamics

Antonyms: none provided

Broader terms: law of thermodynamics, conservation

History

Etymology

No etymology was provided for this word.

Across languages

Translations

8 source translations are retained for this English entry.

  • Arabic: حِفْظ الطَّاقَة (ḥifẓ aṭ-ṭāqa) — conservation of energy
  • Danish: energibevarelse — conservation of energy
  • Finnish: energian säilyminen — conservation of energy
  • Finnish: energian häviämättömyys — conservation of energy
  • German: Energieerhaltung — conservation of energy
  • Greek: διατήρηση της ενέργειας (diatírisi tis enérgeias) — conservation of energy
  • Hindi: ऊर्जा संरक्षण (ūrjā sanrakṣaṇ) — conservation of energy
  • Romanian: conservarea energiei — conservation of energy