Meanings

nuclear decay

decay chain

radioactive decay

gravitational collapse

to die (of the emperor, etc.)

to die (of the emperor, etc.)

class disruption (e.g. due to discipline problems)

fall of a wall

collapse of the housing bubble

inconsistently, horribly drawn animated film or cartoon

to sit cross-legged

surging crowd

collapse

radioactive decay series

to surge like an avalanche

collapse of a bubble economy

disintegration

to smile broadly

to undermine

decay heat