Definitions
1.nounThe European species Sorbus aucuparia, commonly known as rowan or more specifically European rowan."2007, Tyler Guthrie, Mountain Ash: Formally Rowan Tree, Trinity College, Academic Dissertation."
2.nounAny of several trees in the genus Sorbus in North America.
3.nounA tree native to southeastern Australia, Eucalyptus regnans, the tallest of all flowering plants.
4.nounA Texan ash tree species, Fraxinus texensis.