co·​ro·​na | \kə-ˈrō-nə \
plural coronas

Definition of corona 

(Entry 1 of 2)

1 : the projecting part of a classic cornice

2 : something suggesting a crown: such as

a plural coronae\ kə-​ˈrō-​(ˌ)nē \ 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

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


geographical name
Co·​ro·​na | \kə-ˈrō-nə \

Definition of Corona (Entry 2 of 2)

city in southern California east of Los Angeles population 152,374

Illustration of corona

Illustration of corona


a corona 2c

In the meaning defined above

Examples of corona in a Sentence

Recent Examples on the Web: Noun

Every so often, particles within the corona get super heated and shoot out from the Sun in what’s known as solar wind. Loren Grush, The Verge, "The NASA spacecraft that will journey to the Sun just got its super deluxe heat shield," 8 July 2018 The Parker will be entering the sun's corona, an envelope of plasma that surrounds the star. David Grossman, Popular Mechanics, "Upcoming Solar Probe Gets Its All-Important Heat Shield," 9 July 2018 Facing west, the admirers watched as the bright yellow sun, with its orange corona and outlying circles of ambers and blues, dipped beneath the horizon, turning the placid water that mirrored the heavenly body, to darkness. Donna Vickroy, Daily Southtown, "People gather at waterfronts to watch the sun set on the Southland," 11 July 2018 Sensitive exhibits were kept to the heart of the museum, dually shielded by the majestic exterior corona and a layer of glass beneath. Ryan P. Smith, Smithsonian, "The African American History and Culture Museum Wins Gold for Going Green," 21 Apr. 2018 There's still a lot scientists don't know about the sun's corona, which is why NASA is launching the Parker Solar Probe to explore it later this year. David Grossman, Popular Mechanics, "New Model Shows Just How Strong Solar Flares Could Get," 8 Feb. 2018 The goal is to study the sun’s atmosphere, weather, and magnetism and figure out the mystery of why the sun’s corona (its atmosphere) is much hotter than its surface. Brian Resnick, Vox, "Summer is for meteor showers and stargazing. Here’s how to watch.," 22 June 2018 Each section constitutes a crown or corona, typically a cyclical sequence of 14 sonnets connected by a single addressee or subject; the poems are linked by repeating the final line of the preceding poem as the first line of the succeeding sonnet. Walton Muyumba,, "The right poetry collection for right now: Terrance Hayes' 'American Sonnets for My Past and Future Assassin'," 14 June 2018 Some things have stayed the same, and for the right reasons, including a nice rib-eye steak, a posh steak tartare and perfectly grilled octopus with corona beans. Mike Sutter, San Antonio Express-News, "Review: Reborn Rebelle now San Antonio’s finest seafood restaurant," 14 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'corona.' 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 corona


1548, in the meaning defined at sense 1

History and Etymology for corona


borrowed from Latin corōna "garland worn on the head as a mark of honor or emblem of majesty, halo around a celestial body, top part of an entablature" — more at crown entry 1

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Time Traveler for corona

The first known use of corona was in 1548

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More Definitions for corona



English Language Learners Definition of corona

: a bright circle seen around the sun or the moon


co·​ro·​na | \kə-ˈrō-nə \

Medical Definition of corona 

: the upper portion of a bodily part (as a tooth or the skull)

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Comments on corona

What made you want to look up corona? Please tell us where you read or heard it (including the quote, if possible).


playful or foolish behavior

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