Skip to definition.

Noun: mountain ash
  1. Any of various trees of the genus Sorbus
  2. Tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world
    - Eucalyptus regnans
  3. Low-growing ash of Texas
    - Fraxinus texensis

Derived forms: mountain ashes

Type of: angiospermous tree, ash, ash tree, eucalypt, eucalyptus, eucalyptus tree, flowering tree

Part of: genus Sorbus, Sorbus

Encyclopedia: Mountain ash