The term “plus one” typically refers to an additional guest that someone is allowed to bring to an event, such as a wedding, party, or other social gathering. When an invitation states “plus one,” it means that the invited person can bring another individual along, which is often a romantic partner, friend, or family member.
In a broader context, “plus one” can also be used metaphorically to signify someone who complements or supports another person in various situations, such as in work, social settings, or personal relationships.
If you have a specific context in mind for “my plus one,” please provide more details, and I can offer a more tailored explanation!