plural onions
1
: a widely cultivated Asian herbaceous plant (Allium cepa) of the amaryllis family that has a pungent edible bulb and that is closely related to the garlic, chive, and leek
also
: its bulb
2
: any of various usually ornamental alliums (such as Allium amplectens or A. caeruleum) related to the onion
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
The Angel Reese meal deal comes with a Quarter Pounder topped with cheese, bacon, onions, pickles and a bold, smokey BBQ sauce along with a side of french fries and a Hi-C Orange Lavaburst to drink or soft drink of your choice.
—
Mary Walrath-Holdridge, USA TODAY, 10 Feb. 2025
The end result is a melt-y mix of cheese, ground beef and sweet onions.
—Christine Byrne, StyleCaster, 8 Feb. 2025
Add enough water to cover potatoes and onions and cook over medium flame until potatoes are fork tender, stirring as needed.
—Phil Potempa, Chicago Tribune, 8 Feb. 2025
Add onion and celery and cook until just tender, about 5 minutes.
—Bev Barrett, Twin Cities, 7 Feb. 2025
See all Example Sentences for onion 
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Mary Walrath-Holdridge, USA TODAY, 10 Feb. 2025
The end result is a melt-y mix of cheese, ground beef and sweet onions.
—Christine Byrne, StyleCaster, 8 Feb. 2025
Add enough water to cover potatoes and onions and cook over medium flame until potatoes are fork tender, stirring as needed.
—Phil Potempa, Chicago Tribune, 8 Feb. 2025
Add onion and celery and cook until just tender, about 5 minutes.
—Bev Barrett, Twin Cities, 7 Feb. 2025
See all Example Sentences for onion
Dictionary Entries Near onion
Cite this Entry
“Onion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onion. Accessed 21 Feb. 2025.
Copy CitationKids Definition
onion
noun
on·ion
ˈən-yən 
: a widely grown Asian herb related to the lilies and having edible bulbs that have a sharp odor and taste and are used as a vegetable and to season foods
also
: its bulb
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