any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
a gradual decrease; as of stored charge or current
the process of gradually becoming inferior
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
an inferior state resulting from the process of decaying; "the corpse was in an advanced state of decay"; "the house had fallen into a serious state of decay and disrepair"
fall into decay or ruin; "The unoccupied house started to decay"
undergo decay or decomposition; "The body started to decay and needed to be cremated"
(Greek mythology) a beautiful princess loved by Cupid who visited her at night and told her she must not try to see him; became the personification of the soul