Learner's definition of DISSOLVE
of something solid
to mix with a liquid and become part of the liquid
to officially end (something, such as a marriage, organization, or agreement)
— often used as (be) dissolved
to end or disappear or cause (something) to end or disappear
◊ If you dissolve in/into tears/laughter, etc., you start to cry, laugh, etc., in an uncontrolled way.