What is Plus One?

A plus one (often written as "+1") refers to an additional guest that an invited person is allowed to bring to an event. This term is commonly used for weddings, formal parties, and corporate events. When an invitation includes "and guest" or indicates a plus one is allowed, the invitee may bring one companion of their choosing. The plus one tradition helps ensure that guests have someone to socialize with and feel comfortable at the event. Hosts should clearly indicate on invitations whether plus ones are permitted, as this significantly affects event planning and costs.