Lambda definitions

lăm'də
The eleventh letter of the Greek alphabet (Λ, λ)
noun
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An uncharged hyperon with a mass of c. 1,115.68 MeV/c, which is c. 2,183 times the mass of an electron: it decays very rapidly, usually into a nucleon and a pion.
noun
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The Greek letter "L," which is used as a symbol for "wavelength." A lambda is a particular frequency of light, and the term is widely used in optical networking. Sending "multiple lambdas" down a fiber is the same as sending "multiple frequencies" or "multiple colors." See WDM and wavelength.
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The ratio of the percentage change in an option’s price to the percentage change in an underlying price. Lambda measures the change in option premiums for a percentage point change in the option’s implied volatility. If lambda is high, the value of an option is very sensitive to even small changes in volatility. A low lambda means that volatility changes have little impact on the value of an option.
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( ) The Greek letter used by physicists to denote wavelength. See wavelength.
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The eleventh letter of the Classical and Modern Greek, the twelfth of the Old Greek.
noun
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Unit representation of wavelength.
noun
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(physics) The cosmological constant.
noun
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(computing, programming) A lambda expression.
noun
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(anatomy) The junction of the lambdoid and sagittal sutures of the cranium.
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(physics) A lambda baryon.
noun
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The 11th letter of the Greek alphabet.
noun
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Origin of lambda

Greek of Phoenician origin lmd in Semitic roots