significant other
noun
: a person who is important to one's well-being
especially
: a spouse or one in a similar relationship
Examples of significant other in a Sentence
Before you make such an important decision, you should talk it over with your significant other.
she has threatened to divorce her significant other if he doesn't stop gambling
Recent Examples on the Web
The order bars William Applegate, 31, from contacting the singer, her sister Sarah Carpenter and her sister's significant other George Smith, who both live with her, for five years.
—
Andrea Dresdale, ABC News, 18 June 2026
Half the people here are writing for and/or directing their significant other.
—Mikey O'Connell, HollywoodReporter, 15 June 2026
My significant other of 16 years is fighting cancer.
—Jeanne Phillips, Mercury News, 14 June 2026
One poster on the wedding site The Knot advised inviting someone along with a significant other together on one invitation.
—Teresa Mull, FOXNews.com, 13 June 2026
See All Example Sentences for significant other
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Andrea Dresdale, ABC News, 18 June 2026
Half the people here are writing for and/or directing their significant other.
—Mikey O'Connell, HollywoodReporter, 15 June 2026
My significant other of 16 years is fighting cancer.
—Jeanne Phillips, Mercury News, 14 June 2026
One poster on the wedding site The Knot advised inviting someone along with a significant other together on one invitation.
—Teresa Mull, FOXNews.com, 13 June 2026
See All Example Sentences for significant other
Cite this Entry
“Significant other.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/significant%20other. Accessed 20 Jun. 2026.
Copy CitationMedical Definition
significant other
noun
significant oth·er
-ˈət͟h-ər 
: a person who is important to one's well-being
especially
: a spouse or one in a similar relationship
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