Definition of 'corona'

Noun

1. the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
      Synonyms: aureole
2. (botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
3. an electrical discharge accompanied by ionization of surrounding atmosphere
      Synonyms: corona discharge corposant St. Elmo's fire Saint Elmo's fire Saint Elmo's light Saint Ulmo's fire Saint Ulmo's light electric glow
4. one or more circles of light seen around a luminous object
5. (anatomy) any structure that resembles a crown in shape
6. a long cigar with blunt ends

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