Standard Lemma guide

gigawatt-hour

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.

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Pronunciation

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1

noun

Meaning 1

A unit of energy equal to that provided by one gigawatt acting for one hour (3·6 × 1012 joules).

Definition source: English Wiktionary via Wiktextract

Examples

  • Holonyms: 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) < gram calorie (4.184 J) < microwatt-year (31.536 J) < kilojoule (1.000e3 J) < British thermal unit (1.05506e3 J) < watt-hour (3.600e3 J) < kilogram calorie (4.184e3 J) < milliwatt-year (31.536e3 J) < megajoule (1.000e6 J) < kilowatt-hour (3.600e6 J) < watt-year (31.536e6 J) < gigajoule (1.000e9 J) < megawatt-hour (3.600e9 J) < kilowatt-year (31.536e9 J) < terajoule (1.000e12 J)

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A measure of the amount of equipment that produces, consumes, transmits, or stores this amount of energy.

Definition source: English Wiktionary via Wiktextract

Usage: metonymically

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

By surface analysis, gigawatt + hour, or, by surface analysis, giga- + watt-hour.

Across languages

Translations

5 source translations are retained for this English entry.

  • Finnish: gigawattitunti — unit of electrical energy
  • French: gigawattheure — unit of electrical energy
  • French: gigawatt-heure — unit of electrical energy
  • Italian: gigawattora — unit of electrical energy
  • Swedish: gigawattimme — unit of electrical energy