Meaning of the word "significant other" in English

What does "significant other" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

significant other

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

Noun

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

Example:
She introduced him to her significant other at the party.
Many people prefer to use 'significant other' instead of 'boyfriend' or 'girlfriend' to be more inclusive.