common-law wife
noun/ˌkɒmən lɔː ˈwaɪf/
/ˌkɑːmən lɔː ˈwaɪf/
- a woman that a person has lived with for a long time and who is recognized (in some countries though not the UK) as a wife, without a formal marriage ceremony
（未举行结婚仪式的）事实婚姻的男方，事实婚姻的女方