break up into small parts, typically as the result of impact or decay:when the missile struck, the car disintegrated in a sheet of searing flame
(of a society, family, or other social group) weaken or break apart:the marriage disintegrated amid allegations that she was having an affair
Physics undergo or cause to undergo disintegration at a subatomic level: [no object]:a meson can spontaneously disintegrate [with object]:it has become a relatively easy matter to disintegrate almost any atom
