dissolution

dɪsəˈluːʃ(ə)n

noun

the action of formally ending or dismissing an assembly, partnership, or official body.

the dissolution of their marriage

cessation,conclusion,end,ending,finish,termination,break-up,split-up,winding up/down,discontinuation,suspension,disbandment,disbanding,disestablishment,disunion,separation,dispersal,scattering,prorogation,recess