to remove (something) from legal jurisdiction by law
to remove from government control or management
Bus services were deregulated in the 1980s
In economics to deregulate can refer to many different types of measure, in particular the removal of price controls; the removal of government subsidies to preferred producers; or the removal of barriers to entry of new competitors into a sector. The term sometimes loosely refers to the removal of any impediment to competition, even if privately created — Evan Davis
deregulation /-ʹlaysh(ə)n/ noun
deregulatory adj