omega

The word “omega” means the final letter of the Greek alphabet, symbolizing an ending or the last in a series. In plain terms, the last letter of the Greek alphabet, often used to mean "the end" of something.

“Omega” is pronounced OH-mih-guh (/ˌoʊˈmeɪɡə/ in IPA).

Here is “omega” used in a sentence: “The book's title, "Alpha to Omega," promised to cover everything from start to finish.”

“Omega” is a noun.

The word “omega” comes from Greek. From Greek ō mega, literally "great O," distinguishing it from the short o of omicron.

“Omega” is an uncommon word in modern English.

“Omega” has 3 distinct senses listed in this dictionary. The most common is: the final letter of the Greek alphabet, symbolizing an ending or the last in a series.

Alpha is the first letter of the Greek alphabet and omega is the last, so together they represent a complete range from beginning to end. This pairing is why "alpha and omega" is used to mean the entirety of something, from start to finish.

Physicists use the lowercase Greek letter omega (ω) as a standard symbol for angular velocity, the rate at which an object rotates around an axis. Greek letters are widely used in physics and engineering as compact symbols for specific quantities, and omega has become the conventional choice for this one.

Calling something the omega of a series means it is the final or ultimate point in that sequence, echoing omega's role as the last letter of the Greek alphabet. It is often paired conceptually with "alpha" to signal a definitive beginning-to-end range.