• synonyms


  1. the 11th letter of the Greek alphabet (Λ, λ).
  2. the consonant sound represented by this letter.
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Origin of lambda

< Greek lá(m)bda < Semitic; see lamed
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for lambda

Contemporary Examples

Historical Examples

  • The second lambda is inserted in order to avoid the ill-omened sound of destruction.

  • Pions and muons, plus and minus; the lambda and the antilambda.

    A Feast of Demons

    William Morrison

  • Giving the lambda a fillip with my finger, I turned it upside down.

  • Another annular nebula is that situated to the south-west of Lambda Scorpii.

    Aether and Gravitation

    William George Hooper

  • They Lambda Chied us till they became sick of it, and all our attempts to get even proved failures.

    Frank Merriwell at Yale

    Burt L. Standish

British Dictionary definitions for lambda


  1. the 11th letter of the Greek alphabet (Λ, λ), a consonant transliterated as l
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Word Origin

C14: from Greek, from Semitic; related to lamed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lambda


Greek letter name, from a Semitic source akin to Hebrew lamedh.

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Online Etymology Dictionary, © 2010 Douglas Harper

lambda in Medicine


  1. The 11th letter of the Greek alphabet.
  2. The craniometric point at the junction of the sagittal and lambdoid sutures.
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  1. Of, relating to, or characterizing a polypeptide chain that is one of two types of light chains present in immunoglobins.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.