significant other
US /sɪɡˈnɪf.ɪ.kənt ˈʌð.ər/
UK /sɪɡˈnɪf.ɪ.kənt ˈʌð.ər/

1.
partner, levensgezel
a person with whom someone has a long-term, committed relationship, especially one who is not a spouse but is considered a partner in life
:
•
She introduced him to her significant other at the party.
Ze stelde hem voor aan haar partner op het feest.
•
Many people prefer to use 'significant other' instead of 'boyfriend' or 'girlfriend' to be more inclusive.
Veel mensen geven er de voorkeur aan om 'partner' te gebruiken in plaats van 'vriend' of 'vriendin' om inclusiever te zijn.