Step 1: Definition of Solution.
A solution is a homogeneous mixture of two or more substances. In a solution, one substance is dissolved in another, with the substance present in the greater amount being the solvent, and the substance present in the lesser amount being the solute.
Step 2: Conclusion.
Solutions can be in any phase: solid, liquid, or gas. Common examples include salt dissolved in water (aqueous solution) or air (gas solution).