| an oak, Quercus phellos, of the southwestern U.S., having entire, narrow leaves, yielding a hard, heavy wood used in the construction of buildings. |
| willow oak n. A deciduous timber tree (Quercus phellos) of the southern and central United States, having narrow, linear to oblong willowlike leaves. |
willow oak
any of several species of North American ornamental and timber trees belonging to the red oak group of the genus Quercus, in the beech family (Fagaceae), which have willowlike leaves.
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