Definition:-

• 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 disc of the moon. (noun)
• A part of the body resembling or likened to a crown. (noun)
• The cup-shaped or trumpet-shaped outgrowth at the centre of a daffodil or narcissus flower. (noun)
• A circular chandelier in a church. (noun)
• A part of a cornice having a broad vertical face. (noun)