—v.i. 1. to separate into parts or lose intactness or solidness; break up; deteriorate: The old book is gradually disintegrating with age. 2. Physics. a. to decay.
b. (of a nucleus) to change into one or more different nuclei after being bombarded by high-energy particles, as alpha particles or gamma rays.
—v.t. to reduce to particles, fragments, or parts; break up or destroy the cohesion of: Rocks are disintegrated by frost and rain.