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
The most striking view during a total eclipse is said to be the outer atmosphere of the sun called the corona.
Stars will appear in the middle of the afternoon, the temperature will drop and people with special solar glasses will be able to see the sun’s corona, the outer edges of the sun, fan out from the black disc in stark contrast with the dark sky.
As an eclipse reaches totality, the sun’s wispy outer atmosphere, known as the corona, appears to spill out from behind the moon.
The probe will fly into the sun's atmosphere, marking the first time in history that a spacecraft travels into the sun's corona.
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.
Eclipses can help researchers explore the difficult-to-see chromosphere—a thin layer at the base of the sun’s corona.
Looking skyward, the eclipse will give spectators their only chance to view the sun's lower corona.
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)
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