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lambda.

The eleventh letter of the Classical and Modern Greek alphabet, the twelfth of the Old Greek alphabet.

6 characters2 syllables approx.English language

Meaning & usage

noun/ˈlæm.də/UK, US
  1. The eleventh letter of the Classical and Modern Greek alphabet, the twelfth of the Old Greek alphabet.

  2. Unit representation of wavelength.

  3. The cosmological constant.

  4. Ellipsis of lambda baryon.

    abbreviation · alt-of · ellipsis
  5. Ellipsis of lambda expression.

    abbreviation · alt-of · ellipsis
  6. Ellipsis of lambda function.

    abbreviation · alt-of · ellipsis
  7. The junction of the lambdoid and sagittal sutures of the cranium.

  8. The percentage change in an option value divided by the percentage change in the underlying asset's price.

Where this word comes from

From Ancient Greek λάμβδα (lámbda). Doublet of lamed.

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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.