What is exact meaning of dissolve?

Answer 1

a molecule dissolves when ions are created.

example:

NaCl dissolves into Na+ and Cl-

Answer 2

Dissolve means to mix a solid substance into a liquid until it forms a solution. It can also refer to the act of breaking down or disintegrating something into smaller parts. In a more abstract sense, it can signify the ending or termination of something, such as a relationship or partnership.