The substance that gets dissolved (in the solvent) when a solution is formed.

The substance that a solute is dissolved in when a solution is formed.

A homogeneous mixture containing a solute dissolved in a solvent.

Refers to a substance being able to dissolve in a particular solvent (eg, sugar is soluble in water).

Refers to a substance being unable to dissolve in a particular solvent (eg, chalk is insoluble in water).