de ‧ reg ‧ u ‧ late /ˌdiːˈreɡjəleɪt, ˌdiːˈreɡjʊleɪt/ BrE AmE verb [transitive usually passive]
to remove government rules and controls from some types of business activity:
industries that have been deregulated
—deregulation /diːˌreɡjəˈleɪʃ ə n, diːˌreɡjʊˈleɪʃ ə n/ noun [uncountable]