: a person who accompanies an invited guest to an event or gathering at which guests are allowed to bring a companion or partner
My husband twice received handsome engraved invitations to presidential dinners. For those events and many others, I was the perpetual plus-one.Ana Marie Cox

Examples of plus-one in a Sentence

Recent Examples on the Web
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After leaving New York City's Radio City Musical Hall on June 8 with his plus-one, wife Amal Clooney, the star had a night to remember. Bailey Richards, PEOPLE, 6 Oct. 2025 Echoing Vallario, Hoover knew that Burch and Derek Blasberg, the hosts—both of whom are parents—wouldn’t bat an eye at a tiny plus-one. Hannah Jackson, Vogue, 15 Sep. 2025 For the past three years, my now-estranged husband had been my plus-one on nearly all my work travel. Essence, 12 Sep. 2025 And there’s also the suggestion that Michaela believes Simone is betraying the feminist cause by settling at such a young age for the role of plus-one to a wealthy man who treats his relationships like a transaction. Roxana Hadadi, Vulture, 10 Sep. 2025 See All Example Sentences for plus-one

Word History

First Known Use

1977, in the meaning defined above

Time Traveler
The first known use of plus-one was in 1977

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Cite this Entry

“Plus-one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plus-one. Accessed 9 Oct. 2025.

Last Updated: - Updated example sentences
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