1. Plant Pathol.
a. a decay of seasoned timber, resulting in its becoming brittle and crumbling to a dry powder, caused by various fungi.
b. any of various diseases of plants in which the rotted tissues are dry.
2. any concealed or unsuspected inner decay.
Pronunciation: (drī'rot"), [key]
—v.i., v.t., -rot•ted, -rot•ting.
to undergo or cause to undergo the action or effects of dry rot.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.