Definition of Corona

Noun: corona (coronas,coronae) ku'row-nu

The outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
- aureole
(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
An electrical discharge accompanied by ionization of surrounding atmosphere
- corona discharge, corposant [archaic], St. Elmo's fire, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, electric glow
One or more circles of light seen around a luminous object
(anatomy) any structure that resembles a crown in shape
A long cigar with blunt ends