What are the three types of solution?
Unsaturated: the solution contains solute, but less than its equilibrium point.
Saturated: the solution contains just enough solute to reach its equilibrium point.
Supersaturated: the solution technically contains more solute than it can contain; this is usually done by manipulating temperature or some other variable to pack enough solute in then lowering the temperature. This results in rapid crystallization of the solute if one "seeds" it with a crystal of solute, as such: