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petabyte.

One quadrillion (10¹⁵, or 1,000,000,000,000,000) bytes or 1,000 terabytes.

8 characters3 syllables approx.English language

Meaning & usage

noun/ˈpɛtəbaɪt/

  1. One quadrillion (10¹⁵, or 1,000,000,000,000,000) bytes or 1,000 terabytes.

  2. A pebibyte.

    informal
Where this word comes from

Etymology tree English peta- Proto-Indo-European *bʰeyd- Proto-Indo-European *-t Proto-Indo-European *bʰéydt Proto-Germanic *bītaną Proto-West Germanic *bītan Old English bītan Middle English biten English bite English byte English petabyte From peta- + byte.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.