Phrase guide

mass 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

noun

Meaning 1

The energy present in an object because of its mass

Definition source: English Wiktionary via Wiktextract

Topics: natural-sciences, physical-sciences, physics

Examples

  • Even a minuscule quantity of matter contains an incredible amount of mass energy.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

(physics) the mass of a body regarded relativistically as energy

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: mass

History

Etymology

No etymology was provided for this word.

Across languages

Translations

3 source translations are retained for this English entry.

  • Chinese Mandarin: 質能 /质能 — energy present in an object because of its mass
  • Finnish: massaenergia — energy present in an object because of its mass
  • Irish: maisfhuinneamh — energy present in an object because of its mass