English Reference

Word

omega

US/oʊˈmeɪɡə/

UK/əʊmˈeɪɡɐ/

Definitions

01Greek letter

B2

n. the 24th and final letter of the Greek alphabet.

n. the twenty-fourth and final letter of the Greek alphabet, represented as Ω (uppercase) or ω (lowercase).

“The scientist used the symbol omega to represent a specific value in the equation.”

“The professor explained that the lowercase omega is frequently used in physics to represent angular velocity.”

Antonyms

02the end

C1

n. the very last part or the end of a series.

n. the final or ultimate member of a sequence; the conclusion of a process or period.

“He described the discovery as the alpha and omega of his entire career.”

“In theological contexts, the phrase 'the Alpha and the Omega' signifies the beginning and the end of all existence.”

Literary · Formal

Synonyms

endconclusionfinality

Antonyms

03social hierarchy

C2

n. a person at the bottom of a social group, or someone who does not fit into traditional hierarchies.

n. a person perceived as being at the lowest tier of a social hierarchy, or one who exists outside of it entirely; often contrasted with 'alpha'.

“In some online communities, people describe themselves as omegas to show they don't care about being leaders.”

“The discussion focused on how the 'omega' archetype has evolved in internet subcultures to represent a rejection of traditional masculine competition.”

Slang · Informal

Antonyms

04finance

C2 · Finance

n. a measurement used to see how much an option's price changes compared to the asset it is based on.

n. the percentage change in an option's value relative to a one-percent change in the price of the underlying asset.

“The trader checked the omega of the position to understand the potential risk.”

“Calculating the omega provides a more granular view of leverage than delta alone when managing a complex derivatives portfolio.”

Technical

Synonyms

05ultimate or extreme

C2

adj. the most extreme or highest version of something.

adj. denoting the ultimate, most extreme, or final degree of a quality.

“That was an omega fail that everyone will remember for years.”

“The project was described as an omega-level threat in the script, indicating it could destroy the entire city.”

Slang

06supremely

C2

adv. to the highest possible degree.

adv. used as an intensifier to mean supremely or ultimately.

“The new game is omega hard, even for experienced players.”

“The final boss was omega difficult, requiring a perfect strategy and hours of practice to defeat.”

Slang

Real-World Examples

“In Greek, that would appear as ΠΙΛΑΤΩ, with a final omega rather than a final omicron, or O.”
Phys.org · 2 Sept 2026
“It’s not unusual for games to give a reverent nod to Twin Peaks now and then, but this studio is the alpha and omega of interactive Lynchian nightmares.”
The Guardian · 22 Sept 2026

Etymology

From Middle English, from Ancient Greek ὦ μέγα (ô méga), meaning “great ω” (omega is a long vowel in Ancient Greek).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domains

FinancePhysics

This entry

Level
C2 · Proficiency
Frequency
Frequent
Updated

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English Reference