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

Alright class, settle down now, let’s take a look! You’ve stumbled upon a word that can seem quite grand, “Lambda,” it's called, across the linguistic land. The dictionary gives you facts, precise and neat, Saying it’s eleventh in Greek, a scholarly treat! And twelfth in Old Greek, a historical plea, But what does it mean ? Let’s set our knowledge free! In mathematics, my dears, don't be misled, “Lambda” has a different meaning instead. It represents a function – quick and small, A nameless little helper, answering your call! Think of it as "a function," short and bright, Without a name to give it, shining light. So while the Greek alphabet holds its ancient sway, Lambda in math means something new today! Does that make sense? Any questions you might pose?