Definition: The twenty-fourth letter of the Classical and the Modern Greek alphabet, and the twenty-eighth letter of the Old and the Ancient Greek alphabet, i.e. the last letter of every Greek alphabet. Uppercase version: Ω; lowercase: ω.

Alright class, settle down, let’s take a look! Now we're talking about 'omega,' a word that’s quite grand, It’s the final letter in a language planned! The dictionary tells us, with a helpful plea, That ‘omega’ is the last one, you see! In Greek alphabets – old and new they reside, From Classical times to where our knowledge does glide. The Old and Ancient Greeks, they used it with grace, And now we use it in math, in time and space! Uppercase 'Ω', a bold and grand sign, Lowercase 'ω', so delicate and fine. So remember this lesson, don’t you delay, 'Omega' is the last letter – hooray! Do you have any questions about this final decree? Let's discuss!