omega
Americannoun
-
the 24th and last letter of the Greek alphabet (Ω, ω).
-
the vowel sound represented by this letter.
-
the last of any series; the end.
noun
-
the 24th and last letter of the Greek alphabet (Ω, ω), a long vowel, transliterated as o or ō
-
the ending or last of a series
-
An omega baryon.
-
An omega meson.
Etymology
Origin of omega
< Greek ō méga literally, great o. omicron
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They all bear a special omega mark above Lincoln’s shoulder.
From The Wall Street Journal • Nov. 12, 2025
The decision says almost nothing about the procedure that most laypersons think is the alpha and omega of IVF — the implantation of manually fertilized embryos into the uterus.
From Los Angeles Times • Jun. 5, 2024
A higher omega 3:6 ratio was linked to a 26% reduced risk of depression.
From Salon • Feb. 21, 2024
The menhaden fished in the Atlantic by the Omega Protein Corporation’s fleets is used to produce, among other products, lipstick, animal feed, and omega fish oil dietary supplements.
From Slate • Feb. 4, 2024
The screen responded as quickly as thought itself, and out of the welter of lines and flashes a series of pictures formed with perfect clarity: compasses, alpha and omega again, lightning, angel.
From "The Subtle Knife" by Philip Pullman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
