the 11th letter of the greek alphabet (Λ, λ).
the consonant sound represented by this letter.

< Greek (m)bda < Semitic; see lamed Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
lambda (ˈlæmdə)
the 11th letter of the Greek alphabet (Λ, λ), a consonant transliterated as l
[C14: from Greek, from Semitic; related to lamed]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

lambda lamb·da (lām'də)

  1. Symbol λ The 11th letter of the Greek alphabet.

  2. The craniometric point at the junction of the sagittal and lambdoid sutures.

Of, relating to, or characterizing a polypeptide chain that is one of two types of light chains present in immunoglobins.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Computing Dictionary

LAMBDA definition

A version of typed lambda-calculus, used to describe semantic domains.
["Outline of a Mathematical Theory of Computation", D.S. Scott, TM PRG-2, PRG, Oxford U, 1971].

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Whatever the mysterious lambda is, it must do its work only across great distances, on a cosmic scale.
Lambda, also known as the cosmological constant, has come in handy of late.
And then the lambda decays into a negative pion and a proton.
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