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
And the solar corona — the star’s normally invisible outer fringe — burst into view.
The spicules surge thousands of miles high, passing through the chromosphere and into the sun’s corona before collapsing.
Day will suddenly turn to twilight, and the sun’s stunning outer atmosphere known as its corona will radiate around the moon.
During an eclipse, the bright star is covered up, allowing astronomers on the ground to explore the corona.
Some of the sensors extend from four antennae off the shield's corners, so they will be enveloped in the inferno of the corona.
A new sun-orbiting satellite launching in 2018, called the Parker Solar Probe, will study the corona in unprecedented detail, providing new information about how the sun’s atmosphere gets so hot and spits out harmful CMEs.
Day will turn to night and nothing but the outermost part of the sun's atmosphere, called the corona, will be left shimmering in the sky.
The corona is far from an indistinct haze; skywatchers report seeing great jets and ribbons of light, twisting and curling out into the sky.
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.
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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