mountain ash

Short definition from Wiktionary

Noun

1. 1
   A European tree, rowan or, more specifically, European rowan, of species Sorbus aucuparia.
2. 2
   Any of several trees in the genus Sorbus in North America.
3. 3
   A tree native to southeastern Australia, Eucalyptus regnans, the tallest of all flowering plants.
4. 4
   A Texan ash tree of species Fraxinus texensis.

Proper noun

1. 1
   A town in Mountain Ash East community and Mountain Ash West community, Rhondda Cynon Taf borough county borough, Wales (OS grid ref ST0499). The communities have no councils.
2. 2
   An unincorporated community and coal town in Whitley County, Kentucky, United States.