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Definition of significant other noun from the Oxford Advanced Learner's Dictionary

significant other

noun
 
/sɪɡˌnɪfɪkənt ˈʌðə(r)/
 
/sɪɡˌnɪfɪkənt ˈʌðər/
(often humorous)
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  1. your husband, wife, partner or somebody that you have a special relationship with
    • Everyone here is with their spouse or their significant other.
    Topics Family and relationshipsc2
See significant other in the Oxford Advanced American Dictionary
trait
noun
 
 
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