*  A solution is a homogeneous mixture of two or more substances.
*  The particles of solute in a solution cannot be seen by the naked eye. By contrast, particles may be visible in a suspension.
*  A solution does not cause beams of light to scatter. By contrast, the particles in a suspension or colloid can cause Tyndall scattering or Rayleigh scattering.
*  A solution is stable, and solutes will not precipitate unless added in excess of the mixture's solubility, at which point the excess would remain in its solid phase. A solution containing more dissolved solutes than at equilibrium is referred to as supersaturated.
*  The solutes and solvents in a solution cannot be separated by  filtration (or mechanically).
*  It is composed of only one phase.