Definition of silver leaf
noun [mass noun]
1a fungal disease of ornamental and fruit trees, especially plum trees, resulting in silvery discoloration of the leaves.
- The fungus is Chondrostereum purpureum, family Stereaceae, class Hymenomycetes
2silver that has been beaten into a very thin sheet, suitable for applying to surfaces as a decoration: a layer of silver leaf gives it a metallic sheen