ome·​ga | \ō-ˈmā-gə, -ˈmē-, -ˈme- \

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 several types of fatty fish that contains omega 3, which is anti-inflammatory. Allison Horton, miamiherald, "Want to reduce your odds of getting cancer? Stay active, lose weight and eat healthy," 25 May 2018 The album—a lean and loud thing; puffed up but never obnoxiously self-important—descends as the omega of Beyoncé and Jay-Z's years-long saga of woe and redemption. Jason Parham, WIRED, "Beyoncé and Jay-Z's Everything Is Love Marks a New Step in the Album's Evolution," 19 June 2018 The yolk contains vitamins A, D, E and K, as well as omega 3 fatty acids. Sheah Rarback, miamiherald, "Study shows egg yolks are actually good for you | Miami Herald," 11 May 2018 Chefs in Curaçao have developed recipes featuring the omega 3-rich lionfish, and one local business is using the fish to create artisanal jewelry. Staff, The Christian Science Monitor, "Meanwhile in ... Greenland, dog sleds were used to rush ballots to remote polling areas," 31 May 2018 Image The Honeybrains cafe in Manhattan’s NoHo neighborhood serves curry cauliflower bowls, turmeric omega juice shots and mood-boosting supplements all intended to enhance mind and body. New York Times, "These Lights Are Like a Mood Ring for Your Room," 8 May 2018 Side effects from omega 3 fatty acids can include burping up a fishy taste, stomach distress, and heartburn. David Becker,, "Why this cardiologist is no longer recommending fish oil supplements," 1 May 2018 The science seems vague, but there’s some evidence that CBD stimulates hair growth when applied to the scalp because of the omega fatty acids. Claire Valentine, The Cut, "12 CBD Beauty Products for Celebrating 420," 20 Apr. 2018 Doctors also recommend reducing your supplement intake (think: vitamin E, omega 3s, etc.) for the same reason. Erin Nicole Celletti, Allure, "The Complete Guide to Breast Augmentation," 10 Apr. 2018

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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English Language Learners Definition of omega

: the 24th and last letter of the Greek alphabet


variants: or ω- \ō-​ˈmeg-​ə, -​ˈmā-​gə, esp 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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Comments on omega

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a nest or breeding place

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