megawatt-hour

noun

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

Similar

Meanings

nounmegawatt-hour (plural megawatt-hours)

plural megawatt-hours

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

    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)

    1 more example

    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)

Synonyms & antonyms

nouna unit of energy equal to the work done by a power of 1000000 watts operating for one hour.

Similar
Broader
work unitheat unitenergy unit

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

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

Full word history & related roots →

Translations

Danish megawatt-time
  • megawatt-timeunit of energy
Finnish megawattitunti
  • megawattituntiunit of energy
French mégawattheure
  • mégawattheureunit of energy
German Megawattstunde
  • Megawattstundeunit of energy
Greek μεγαβατώρα
  • μεγαβατώρα (megavatóra)unit of energy
Italian megawattora
  • megawattoraunit of energy
Norwegian Bokmål megawattime
  • megawattimeunit of energy
Swedish megawattimme
  • megawattimmeunit of energy
Cite this entry
APA

megawatt-hour. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/megawatt-hour

MLA

“megawatt-hour.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/megawatt-hour. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “megawatt-hour,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/megawatt-hour.

Source: megawatt-hour on Wiktionary, CC BY-SA 4.0.