on·​ion | \ ˈən-yən How to pronounce onion (audio) \

Definition of onion

1 : a widely cultivated Asian herb (Allium cepa) of the lily family with pungent edible bulbs also : its bulb
2 : any of various plants of the same genus as the onion

Other Words from onion

oniony \ ˈən-​yə-​nē How to pronounce onion (audio) \ adjective

Examples of onion in a Sentence

The recipe calls for chopped onions. He is growing onions in the garden this year. The recipe calls for chopped onion.
Recent Examples on the Web Top each with 1/4 cup each corn and tomatoes, and some of the red onion, then drizzle each with the lime juice and sprinkle with salt. Ellie Krieger, Washington Post, 15 Sep. 2022 Pete’s version is full of hominy and balances the earthy, hayfield funk of the tripe with plenty of pungent raw onion, serrano chiles and tart lemon served with fresh flour tortillas for a rib-sticking delight. Paul Stephen, San Antonio Express-News, 8 Sep. 2021 The cast-iron grates are set close enough to keep shrimp and rings of onion from falling through, though a grill basket comes in handy for asparagus and other skinny veg. Amanda Shapiro, Bon Appétit, 2 Sep. 2022 Top each with a handful of the onion and jalapeño slices and, using the spatula, press them into the meat. Ann Maloney, Washington Post, 9 Aug. 2022 Place stock, 1¼ cups of the celery and 1 cup of the onion in a medium saucepan. People Staff, PEOPLE.com, 30 July 2022 Peering through that barrier is a bit like peeling off an onion's skins. Seth Fletcher, Scientific American, 20 Aug. 2022 CNOs are nanostructures with spherical carbon shells in a concentric layered structure similar to an onion. Margaret Osborne, Smithsonian Magazine, 9 Aug. 2022 Build the new platform with the architecture of an onion. Bernhard Schroeder, Forbes, 3 Aug. 2022 See More

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

First Known Use of onion

14th century, in the meaning defined at sense 1

History and Etymology for onion

Middle English, from Anglo-French oignon, from Latin union-, unio

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Time Traveler for onion

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The first known use of onion was in the 14th century

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onion couch

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Last Updated

23 Sep 2022

Cite this Entry

“Onion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onion. Accessed 1 Oct. 2022.

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More Definitions for onion


on·​ion | \ ˈən-yən How to pronounce onion (audio) \

Kids Definition of onion

: the roundish edible bulb of a plant related to the lily that has a sharp odor and taste and is used as a vegetable and to season foods

More from Merriam-Webster on onion

Nglish: Translation of onion for Spanish Speakers

Britannica English: Translation of onion for Arabic Speakers

Britannica.com: Encyclopedia article about onion


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