A Solution is a mixture that is consistent throughout.
Components of a solution are distributed evenly throughout the mixture.
When salt is added to a glass of water and dissolved, a solution is created. Salt and water form a single phase of matter (liquid) where the two parts appear as one. Salt molecules are evenly distributed throughout the water molecules creating a solution.
In a solution, the molecule that dissolves another molecule is called a solvent. In our example, water is dissolving salt. Water is the solvent in the mixture of salt and water.
The molecule that is being dissolved in a solution is called the solute. In the example of salt in water, salt is being dissolved. Salt is a solute when dissolved in water.