significant

significant other

A person with whom one is in a serious romantic relationship. Primarily heard in US. Since Kelly didn't have a significant other, she attended her friend's wedding alone.

a significant other

(mainly American)

a person that someone is married to or who they have a serious sexual or romantic relationship with (not used with the ) The ad read, 'Take your significant other to the Café Carlyle for a romantic night out.'

Common Names:

Name	Pronounced	Usage
Filimena	-	Macedonian
Balderstone	['bɔ:ldəstəun]
Isolde	i-ZOL-də (English), i-SOL-də (English), ee-ZAWL-du (German)	English (Rare), German, Arthurian Romance
Ceel	KAY:L	Dutch
Franc	-	Slovene
Vincenzo	veen-CHEN-tso	Italian