plural significant others
: someone that you have a romantic relationship with : your husband, wife, boyfriend, or girlfriend
Before you make such an important decision, you should talk it over with your significant other.
—abbr. SO
Cite this Entry
“Significant other.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/significant%20other. Accessed 24 Jun. 2026.
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