See prominence in Webster's New World College Dictionary
noun
the state or quality of being prominent
something that is prominent or that sticks out, as a hill
Astron. any of the luminous clouds of solar gas arching from the chromosphere into the much hotter corona: best seen at the edge of the sun, as during an eclipse
See prominence in American Heritage Dictionary 4
(prŏmˈə-nəns)
noun
The quality or condition of being prominent.
Something prominent, especially an area of land raised above its surroundings.
Anatomy A small projection or protuberance.
Astronomy A tonguelike cloud of flaming gas rising from the sun's surface, visible as part of the corona during a total solar eclipse.