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
Ashbee	['æʃbi]
Ptolemy	TAHL-ə-mee (English)	History
Anisim	-	Russian
Hulda	['hʌldə]
Tuulikki	TOO:-leek-kee (Finnish)	Finnish, Finnish Mythology
Frits	FRITS	Dutch