definition of
decay

[1] #1 decay v. [disintegrate, decompose] lose a stored charge, magnetic flux, or current; "the particles disintegrated during the nuclear fission process". wn

[2] #2 decay n. the process of gradually becoming inferior. wn

[3] #3 decay n. [decline] a gradual decrease; as of stored charge or current. wn

[4] #4 decay v. [crumble, dilapidate] fall into decay or ruin; "The unoccupied house started to decay". wn

[5] #5 decay n. [decomposition] the organic phenomenon of rotting. wn