civil partner
noun /ˌsɪvl ˈpɑːtnə(r)/
  /ˌsɪvl ˈpɑːrtnər/
 - (in some countries) the person that somebody has a civil partnership with (= a legal relationship between two people of the same sex, with the same legal status as marriage)
- Civil partners are taxed in exactly the same way as married couples.