Dissolve means:
* To become or cause to become liquid or to break down into parts. This can apply to solids dissolving in liquids (like sugar in water) or to substances breaking down into their components (like ice melting).
* To end or cease to exist. This can be used figuratively, like a feeling dissolving, or literally, like a company dissolving.
* To disperse or fade away. This can apply to images, sounds, or emotions.
Here are some examples:
* The sugar dissolved in the water.
* The company dissolved after years of financial trouble.
* The anger in her heart dissolved with time.
Do you have a specific context in mind for the word "dissolve"? That could help me give you a more precise explanation.