: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Grace Van Patten brings her sister Anna as her plus-one to the premiere of The Twisted Tale of Amanda Knox in New York City on Aug. 19. Suki Waterhouse performs live onstage during day three of Reading Festival 2025 in Reading, England, on Aug. 24. Brendan Le, People.com, 27 Aug. 2025 Early on in their relationship, Joe was invited to a wedding for his friend Meg and asked the OP to be his plus-one. Matthew Impelli, MSNBC Newsweek, 15 Aug. 2025 In my opinion, wedding guests are always offered a plus-one when invited — especially a groomsman! Abigail Van Buren, Boston Herald, 12 Aug. 2025 Brad Pitt’s mom and occasional red carpet plus-one, Jane Etta Pitt, has died. Jami Ganz, New York Daily News, 6 Aug. 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 10 Sep. 2025.

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