Standard Lemma guide

megawatt-hour

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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1

noun

Meaning 1

A unit of energy equal to that provided by one megawatt acting for one hour (3·6 × 109 joules).

Definition source: English Wiktionary via Wiktextract

Examples

  • Holonyms: kilowatt-year (31.536e9 J) < terajoule (1.000e12 J) < gigawatt-hour (3.600e12 J) < megawatt-year (31.536e12 J) < petajoule (1.000e15 J) < terawatt-hour (3.600e15 J) < gigawatt-year (31.536e15 J) < exajoule (1.000e18 J) < petawatt-hour (3.600e18 J) < terawatt-year (31.536e18 J)
  • Meronyms: yoctojoule (1.000e-24 J) < zeptojoule (1.000e-21 J) < attojoule (1.000e-18 J) < hartree (4.35974e-18 J) < femtojoule (1.000e-15 J) < picojoule (1.000e-12 J) < nanojoule (1.000e-9 J) < microjoule (1.000e-6 J) < millijoule (1.000e-3 J) < joule (1 J) < milliwatt-hour (3.6 J) < microwatt-year (31.536 J) < kilojoule (1.000e3 J) < watt-hour (3.600e3 J) < milliwatt-year (31.536e3 J) < megajoule (1.000e6 J) < kilowatt-hour (3.600e6 J) < watt-year (31.536e6 J) < gigajoule (1.000e9 J)

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

By surface analysis, megawatt + hour, or, by surface analysis, mega- + watt-hour.

Across languages

Translations

9 source translations are retained for this English entry.

  • Danish: megawatt-time — unit of energy
  • Finnish: megawattitunti — unit of energy
  • French: mégawattheure — unit of energy
  • German: Megawattstunde — unit of energy
  • Greek: μεγαβατώρα (megavatóra) — unit of energy
  • Italian: megawattora — unit of energy
  • Norwegian Bokmål: megawattime — unit of energy
  • Norwegian Nynorsk: megawattime — unit of energy
  • Swedish: megawattimme — unit of energy
Real reading context

megawatt-hour in complete knowledge articles