What is a Lambda?

Question

Could someone provide a good description of what a Lambda is? We have a tag for them and they\'re on the secrets of C# question, but I have yet to find a good definition an

Answer 1

Clipped from wikipedia: http://en.wikipedia.org/wiki/Lambda#Lambda.2C_the_word

In programming languages such as Lisp and Python, lambda is an operator used to denote anonymous functions or closures, following lambda calculus usage.