noun Plant Pathology.
a disease of chestnuts, especially the American chestnut, characterized by bark lesions that girdle and eventually kill the tree, caused by a fungus, Endothia parasitica.
Origin of chestnut blight
An Americanism dating back to 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019