Illustration of corona
- a corona 2c
plural coronas
1
: the projecting part of a classic cornice
2
: something suggesting a crown: such as
a
plural coronae
kə-ˈrō-(ˌ)nē 
also coronas
also coronas
(1)
: a usually colored circle often seen around and close to a luminous body (such as the sun or moon) caused by diffraction produced by suspended droplets or occasionally particles of dust
(2)
: the tenuous outermost part of the atmosphere of a star (such as the sun)
(3)
: a circle of light made by the apparent convergence of the streamers of the aurora borealis
b
: the upper portion of a bodily part (such as a tooth or the skull)
c
: an appendage or series of united appendages on the inner side of the corolla in some flowers (such as the daffodil, jonquil, or milkweed)
d
: a faint glow adjacent to the surface of an electrical conductor at high voltage
e
informal
: coronavirus
In the fight against the consequences of the corona epidemic, the Italian government is resorting to radical measures.—
Anne Kunz et al.
Anne Kunz et al.3
[from La Corona, a trademark]
: a long cigar having the sides straight to the end to be lit and being roundly blunt at the other end
Examples of corona in a Sentence
Recent Examples on the Web
Prominences typically take about a day to form, and those that remain stable can endure in the corona for several months, arching hundreds of thousands of miles into space.
—Joe Edwards, MSNBC Newsweek, 16 May 2025
The biggest shock to anyone standing within that path and having clear weather — which certainly wasn’t everyone on April 8, 2024 — was the sight of the sun's corona, its wispy white outer atmosphere.
—Jamie Carter, Forbes.com, 8 Apr. 2025
The white halo was the sun's corona, and the dark circle was the moon's silhouette.
—Monisha Ravisetti, Space.com, 12 Mar. 2025
It's hoped that by doing so, scientists will better be able to figure out how the sun’s corona becomes the solar wind and so more accurately predict space weather.
—Jamie Carter, Forbes.com, 20 May 2025
See All Example Sentences for corona
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show current usage.
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Joe Edwards, MSNBC Newsweek, 16 May 2025
The biggest shock to anyone standing within that path and having clear weather — which certainly wasn’t everyone on April 8, 2024 — was the sight of the sun's corona, its wispy white outer atmosphere.
—Jamie Carter, Forbes.com, 8 Apr. 2025
The white halo was the sun's corona, and the dark circle was the moon's silhouette.
—Monisha Ravisetti, Space.com, 12 Mar. 2025
It's hoped that by doing so, scientists will better be able to figure out how the sun’s corona becomes the solar wind and so more accurately predict space weather.
—Jamie Carter, Forbes.com, 20 May 2025
See All Example Sentences for corona
Cite this Entry
“Corona.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/corona. Accessed 20 Jun. 2025.
Copy CitationKids Definition
corona
noun
co·ro·na
kə-ˈrō-nə
1
: a usually colored circle often seen around and close to a shining body (as the sun or moon)
2
: the outermost part of the atmosphere of a star (as the sun)
3
: a faint glow next to the surface of an electrical conductor at high voltage
coronal
adjective
ˈkȯr-ən-ᵊl
ˈkär-;
kə-ˈrōn-
Medical Definition
corona
noun
co·ro·na
kə-ˈrō-nə
1
: the upper portion of a bodily part (as a tooth or the skull)
2
informal
: coronavirus
Geographical Definition
Corona
geographical name
Co·ro·na
kə-ˈrō-nə
city in southern California east of Los Angeles population 152,374
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