noun
1.
a. : an American ash ( Fraxinus pennsylvanica ) with densely velvety tomentose branchlets and petioles and lower leaf surfaces pubescent — called also downy ash ; see green ash
b. : an Australian tree ( Alphitonia excelsa ) of the family Rhamnaceae with hard wood
c. : an Australian tree ( Orites excelsa ) of the family Proteaceae
2. : the wood of a red ash tree