Definition of "lambda"

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

(physics, mathematics) Unit representation of wavelength.  examples

(physics) The cosmological constant.  examples

(physics) Short for lambda baryon.  examples

(programming) Short for lambda expression.  examples

(programming) Short for lambda function.  examples

(anatomy) The junction of the lambdoid and sagittal sutures of the cranium.  examples

(finance) The percentage change in an option value divided by the percentage change in the underlying asset's price.  examples