omega
Americannoun
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the 24th and last letter of the Greek alphabet (Ω, ω).
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the vowel sound represented by this letter.
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the last of any series; the end.
noun
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the 24th and last letter of the Greek alphabet (Ω, ω), a long vowel, transliterated as o or ō
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the ending or last of a series
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An omega baryon.
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An omega meson.
Other Word Forms
Noun Inflected Forms
Etymology
Origin of omega
< Greek ō méga literally, great o. Cf. 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.
Heat domes and omega patterns are nothing new and can form separately from each other, experts said.
From Barron's • Jun. 23, 2026
Over the course of six weeks, healthy adults who took the synbiotic experienced the greatest reduction in inflammation related proteins compared with those who took omega 3 or fiber by itself.
From Science Daily • Feb. 11, 2026
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
That sweet little red roan with the omega seared into her left shoulder.
From "Burning Blue" by Paul Griffin
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.
