In law, dissolution has multiple meanings.
Dissolution is the last stage of liquidation, the process by which a company (or part of a company) is brought to an end, and the assets and property of the company redistributed.
Dissolution may also refer to the termination of a contract or other legal relationship; for example, the dissolution of a marriage, or divorce.
Dissolution is also the term for the legal process by which an adoption is reversed. While this applies to the vast majority of adoptions which are terminated, they are more commonly referred to as disruptions, even though that term technically applies only to those that are not legally complete at the time of termination.
In international law, dissolution is when a state has broken up into several entities, and no longer has power over those entities, as it used to have previously. An example of this is the case of the former USSR dissolving into different republics.