The rarefied gaseous envelope of the sun and other stars. The sun's corona is normally visible only during a total solar eclipse when it is seen as an irregularly shaped pearly glow surrounding the darkened disk of the moon. A crown or crownlike structure. A circular chandelier in a church. A part of a cornice having a broad vertical face. A long, straight-sided cigar. A city in southwestern California, southwest of Riverside; population 149,923 (est. 2008).