: 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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At a rookie salary, last June’s No. 20 pick out of Illinois would stand as a low-risk, high-reward plus-one package piece for the Bucks. Ira Winderman, Sun Sentinel, 3 Feb. 2026 Klum also brought her husband as her plus-one to last year's ceremony. Tessa Petak, InStyle, 1 Feb. 2026 Rybakina is just as direct, but flatter and more composed, with serve-plus-one patterns that turn return games into 30-second exercises. The Athletic Staff, New York Times, 31 Jan. 2026 Jacob Elordi revealed his mom will be his plus-one at the Oscars during his appearance on Jimmy Kimmel Live! Yamillah Hurtado, PEOPLE, 28 Jan. 2026 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 22 Feb. 2026.

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