/ˈsɪvəl ˈpɑːtnər/ – Noun
Definition: Đối tác hôn nhân.
A more thorough explanation: a person in a civil partnership (=an officially recognised union that gives same-sex couples rights and responsibilities identical (or very similar, depending on the jurisdiction) to marriage)
Example: A scheme to offer tax breaks to some married couples and civil partners has opened for registration.