Standard Lemma guide

petawatt

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

An SI unit of power equal to 1015 watts. Symbol: PW. An amount of power much larger than all the power generated by all power stations on Earth. (Consuming 1 petawatt during a duration of 1 hour would consume 1 petawatt-hour of energy.)

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

  • Meronyms: mW, milliwatt < W, watt < kW, kilowatt < MW, megawatt < GW, gigawatt < TW, terawatt

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From peta- + watt.