SINCE 1828

An Encyclopædia Britannica Company

plus-one

noun \ ˈpləs-ˈwən \

Definition of plus-one

: 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

First Known Use of plus-one

1977

in the meaning defined above

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