WordNet sense 1 (the process of going into solution):

dissolving

WordNet sense 2 (separation into component parts):

disintegration

WordNet sense 3 (dissolute indulgence in sensual pleasure):

dissipation, licentiousness, looseness, profligacy

WordNet sense 4 (the termination of a meeting):

adjournment

WordNet sense 5 (the termination or disintegration of a relationship (between persons or nations)):

breakup