or plus one

[ pluhs-wuhn ]

  1. a person who accompanies someone to a party or other event when the invitation allows the invited guest to bring another person: I phoned Tom to ask if he would be my plus-one at the gala.

Origin of plus-one

First recorded in 1970–75

Words Nearby plus-one Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use plus-one in a sentence

  • The length should be the headsize measurement plus one-half inch.

    Make Your Own Hats | Gene Allen Martin

British Dictionary definitions for plus-one


  1. informal a person who accompanies an invited person to a social function

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012