Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun significant_other

1 sense of significant other

Sense 1
domestic partner, significant other, spousal equivalent, spouse equivalent -- (a person (not necessarily a spouse) with whom you cohabit and share a long-term sexual relationship)
       => person, individual, someone, somebody, mortal, soul -- (a human being; "there was too much for one person to do")