ome·​ga | \ ō-ˈmā-gə How to pronounce omega (audio) , -ˈmē- How to pronounce omega (audio) , -ˈme- How to pronounce omega (audio) \

Definition of omega

1 : the 24th and last letter of the Greek alphabet — see Alphabet Table
2 : the extreme or final part : end
3a : a negatively charged elementary particle that has a mass 3270 times the mass of an electron

called also omega minus

b : a very short-lived unstable meson with mass 1532 times the mass of an electron

called also omega meson

Examples of omega in a Sentence

Recent Examples on the Web One of my initial skin care concerns was dull skin, but this oil keeps that at bay by using the antioxidant and omega properties in superberries like acai, maqui, prickly pear and goji. Rebecca Rodriguez, NBC News, "Why one shopping writer uses Youth to the People for all her skin care needs," 14 Apr. 2021 Kerecis has pioneered and patented the omega 3 fish skins that need minimal processing and provide an infection barrier while enabling the body to regrow its own tissues. Anchorage Daily News, "Seafood industry execs optimistic for 2020 after troubled pandemic year," 8 Dec. 2020 Courtesy of Walmart Even frequent hand-washing won’t parch your skin thanks to hemp seed, rich in vitamin E and omega fatty acid. Erica Metzger, Better Homes & Gardens, "2020 Beauty Awards: Body Products That We Love," 11 Sep. 2020 Many of the disease-fighting benefits of fish come from its heart healthy omega 3 fatty acids. Stefani Sassos, Ms, Rdn, Cso, Good Housekeeping, "Everything You Need to Know About the Pescatarian Diet," 25 May 2020 Fish isn’t your only source for healthy omega fats. Nicole Clancy, Better Homes & Gardens, "7 of the Best Brain Foods to Improve Your Memory and Concentration," 25 June 2020 Along with turmeric, this Hanoi-style salmon recipe is rich with omega 3 fatty acids that can reduce inflammation and enhance white blood cell activity. Drake Wilson, Sunset Magazine, "The Recipes You Should Be Cooking This February," 10 Feb. 2020 After that, the trainee lies down and an electrode is attached to his forehead and finger for an omega brain-wave reading. Joe Pappalardo, Popular Mechanics, "The Air Force Is Changing How Special Ops Fighters Are Trained," 12 Feb. 2019 The brain and the retina in the eye are omega 3 organs. Anchorage Daily News, "Seafood will get more attention in development of new U.S. dietary guidelines," 10 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'omega.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of omega

15th century, in the meaning defined at sense 1

History and Etymology for omega

Middle English, from Greek ō mega, literally, large o

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Time Traveler for omega

Time Traveler

The first known use of omega was in the 15th century

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Statistics for omega

Last Updated

20 Apr 2021

Cite this Entry

“Omega.” Dictionary, Merriam-Webster, Accessed 7 May. 2021.

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More Definitions for omega



English Language Learners Definition of omega

: the 24th and last letter of the Greek alphabet


variants: or ω- \ ō-​ˈmeg-​ə, -​ˈmā-​gə, especially British ˈō-​meg-​ə \

Medical Definition of omega

: of, relating to, or being a chemical group or position at the end of a molecular chain omega oxidation of fatty acids

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Thesaurus: All synonyms and antonyms for omega

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