Definition of whitethorn
1a : a hawthorn (Crataegus oxycantha) b : scarlet haw
2 : any of several acacias that have peeling bark which gives the trunk a whitish appearance
3 : a whitish-barked shrub (Ceanothus incana) of the coastal mountains of the western U.S. that has often spinose branchlets, leaves whitish beneath, and small white flowers in panicles
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Origin and Etymology of whitethorn
Middle English white thorn, from white + thorn
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