Pronunciation: (rō'un, rou'-), [key]
1. the European mountain ash, Sorbus aucuparia, having pinnate leaves and clusters of bright red berries.
2. either of two American mountain ashes, Sorbus americana or S. sambucifolia.
3. the berry of any of these trees.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.