Definitions for "Colligative Properties"
properties that depend on the concentration of solute molecules or ions in a solution but not on the chemical identity of the solute
the property of a solution to have a greater boiling point and a lower freezing point than a pure substance.
Properties of a solution that depend only on the number of particles dissolved in it, not the properties of the particles themselves. The main colligative properties addressed at this web site are boiling point elevation and freezing point depression.