common law
noun [ U ] uk/ˌkɒm.ən ˈlɔː/ us/ˌkɑː.mən ˈlɑː/
(英格兰和美国大部分地区的)习惯法,普通法,判例法,不成文法
the legal system in England and most of the US that has developed over a period of time from old customs and court decisions, rather than laws made by politicians