Standard Lemma guide

megajoule

noun · 1 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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  • rhymes with -uːl

1

noun

Meaning 1

An SI unit of energy equal to 106 joules. Symbol: MJ

Definition source: English Wiktionary via Wiktextract

Topics: metrology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *méǵh2s Proto-Hellenic *mégas Ancient Greek μέγᾰς (mégăs)der. English mega- English joule English megajoule From mega- + joule.

Across languages

Translations

7 source translations are retained for this English entry.

  • Czech: megajoule — one million joules
  • Finnish: megajoule — one million joules
  • French: mégajoule — one million joules
  • German: Megajoule — one million joules
  • Polish: megadżul — one million joules
  • Russian: мегаджоуль (megadžoulʹ) — one million joules
  • Thai: เมกะจูล — one million joules