A price ceiling is a government-imposed price control or limit on how high a price is charged for a product. Governments intend price ceilings to protect consumers from conditions that could make necessary commodities unattainable. However, a price ceiling can cause problems if imposed for a long period without controlled rationing. Price ceilings... Found on http://en.wikipedia.org/wiki/Price_ceiling
A government-imposed upper limit on the price that may be charged for a product. If that limit is binding, it implies a situation of excess demand and shortage. Found on http://www-personal.umich.edu/~alandear/glossary/p.html