Definition of decay

The noun decay has 5 senses? (first 3 from tagged texts)

(the process of gradually becoming inferior)

(a gradual decrease; as of stored charge or current)

(the organic phenomenon of rotting)

(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")

(the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation)

The verb decay has 3 senses? (first 2 from tagged texts)

(lose a stored charge, magnetic flux, or current; "the particles disintegrated during the nuclear fission process")

(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")