Dissolve is a common English verb and noun with several related meanings. In general it denotes the process by which one substance is incorporated into another so that it appears to disappear, or the ending of a formal entity or relationship. The word is used in science, media, law and everyday life.

Chemical dissolution

In chemistry, to dissolve means that a solute disperses at the molecular or ionic level throughout a solvent to form a solution. Key components are the solute (what dissolves), the solvent (what does the dissolving) and the resulting solution. Solubility describes how much solute can dissolve in a given amount of solvent under specified conditions.

Factors that affect dissolution include temperature, pressure (important for gases), agitation or stirring, and surface area of the solute. Common examples are salt dissolving in water, sugar in tea, and carbon dioxide dissolving in a soft drink. Dissolution differs from melting (solid to liquid by heat) and from simple mechanical disintegration.

Media and visual transitions

In film and video editing, a dissolve is a gradual transition between two shots where the first image fades out as the second fades in. It is used to suggest the passage of time, a change of location, or a thematic link between scenes. The dissolve is more subtle than an immediate cut and less stylized than a wipe.

In legal contexts, dissolution refers to formally ending a binding relationship or entity. Examples include the dissolution of a marriage through divorce proceedings, or the winding up of a corporation or partnership. Procedures and consequences vary by jurisdiction and by the type of entity involved.

Applications, distinctions and notable facts

  • Practical uses: pharmaceuticals (tablets designed to dissolve), cooking (sugar, salt), cleaning agents and industrial processes.
  • Distinctions: solubility vs. miscibility (liquid-liquid), dissolution vs. diffusion (mixing by random motion), and dissolution vs. disintegration (chemical vs. physical breakdown).
  • Etymology: from Latin dissolvere, "to loosen apart"; the root informs both physical and figurative uses.

Understanding the specific sense of "dissolve" depends on context — whether describing a chemical process, a cinematic device, or the formal termination of an organization or relationship.