Nonappearance is a term used to describe the act of not appearing at an event or place. It is synonymous with the term 'ABSENCE, ' which is defined as the state or fact of being absent or not present. Nonappearance can refer to a person, object, or concept that is not present or visible. It can also refer to a situation in which someone or something fails to appear or be seen. Nonappearance can be voluntary or involuntary, and it can have both positive and negative implications.