1. mountain ash, angiospermous tree, flowering tree

usage: any of various trees of the genus Sorbus

2. mountain ash, Eucalyptus regnans, eucalyptus, eucalypt, eucalyptus tree

usage: tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world

3. mountain ash, Fraxinus texensis, ash, ash tree

usage: low-growing ash of Texas

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