Define solution.

Hint: We have to know that matters are divided into three types. There are solids, liquids and gas. The liquids are further classified as three types. This classification is based on the appearance of the liquid. There are suspension, true solution and colloidal solution.

Complete answer:
Solution is nothing but the mixture of solute and solvent in the same form. The same form of solute and solvent in the solution is called a homogeneous solution.
In this homogeneous solution is classified as three types. There are saturated solutions, unsaturated solutions and supersaturated solutions.
Saturated solution is nothing but the correct amount of solute will dissolve in the correct amount of solvent, the solution attains the saturated position. Otherwise, we can say a solution in which more solute cannot dissolve at a given temperature is known as saturated solution.
Unsaturated solution is nothing but a lesser amount of solute will dissolve in the correct amount of solvent, the solution attains an unsaturated position.
Supersaturated solution is nothing but more solute will dissolve in the correct amount of solvent, the solution attains the super saturated position at high temperature.

Additional information:
We need to know that colloidal solutions are also classified as eight types. These types depend on the physical state of the dispersed phase – dispersion medium phase. Depending on the dispersed medium phase, colloidal solution is classified. There are three types. One is hydrosols, benzosols and alcohols. Hydrosols are nothing but the dispersed medium phase is water. Benzosols are nothing but the dispersed medium phase is benzene. Alcohol is nothing but the dispersed medium phase is alcohol. Colloidal solutions are also classified as two types. These types depend on the attraction between dispersed phase and dispersion medium phase. There are lyophilic colloids and lyophobic colloids. There are Liquid – gas, Gas – liquid, liquid – liquid, solid – liquid, liquid – solid, gas – solid, solid – solid and solid – gas.

Note:
We need to know that the homogeneous mixture of two or more substances is called colloidal solutions. One of the substances in the colloidal solution is smaller. Dispersed phase and dispersion medium phase are important terms of colloidal solutions.
 Dispersed phase is nothing but a smaller amount of substance present in the colloidal solution.
Dispersed medium phase is nothing but more amount of substance present in the colloidal solution.