Definition of corona
1 : the projecting part of a classic cornice
2a : 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 dustb : the tenuous outermost part of the atmosphere of a star (such as the sun)c : a circle of light made by the apparent convergence of the streamers of the aurora borealisd : the upper portion of a bodily part (such as a tooth or the skull)e : an appendage or series of united appendages on the inner side of the corolla in some flowers (such as the daffodil, jonquil, or milkweed)f : 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
Recent Examples of corona from the Web
If all goes will, the probe will actually be inside that corona.
But just a few hundred miles above the photosphere, in the star's corona, the temperature suddenly jumps to several million degrees.
At its closest point, the probe will fly 3.9 million miles from the surface of the sun, in the outermost part of the corona, where the temperature is 2,500 degrees Fahrenheit.
The Parker Solar Probe will repeatedly swoop through the outer corona, dipping sensitive science instruments into the raging solar wind.
And there's still much more to learn about the corona, which is much hotter than the sun itself.
The probe’s findings could also help humans better predict space weather, NASA says, like clouds of gas ejected from the sun’s corona that can knock out disrupt satellite operations and knock out whole power grids.
The Parker Solar Probe will fly into the source of the solar wind, the corona.
On the other side of the country, researchers from the Harvard-Smithsonian Center for Astrophysics are planning to study the corona from a plane flying at 49,000 feet.
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.
Origin and Etymology of corona
Latin, garland, crown, cornice — more at crown
First Known Use: 1548
Definition of Corona
city in southern California east of Los Angeles population 152,374
CORONA Defined for English Language Learners
Definition of corona for English Language Learners
: a bright circle seen around the sun or the moon
Definition of Corona for English Language Learners
: U.S. city, California
Medical Definition of corona
: the upper portion of a bodily part (as a tooth or the skull)
Seen and Heard
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