The term "multiple personality" has undergone significant changes over the years, with the condition now being referred to as Dissociative Identity Disorder (DID). However, there are many other synonyms or expressions sometimes used for this disorder, including "split personality," "alter personalities," "co-consciousness," and "dissociative disorders." Though they may have different connotations, these synonyms all ultimately refer to the same condition, which involves the formation of distinct identities or personalities within a single individual. DID can be a complex and difficult condition to treat, but with proper therapy and support, many people with this disorder can learn to live productive and fulfilling lives.