Terminology about addiction can be confusing, and these terms are now synonymous. Terms that are used in common parlance may have more precise meanings within the medical world; moreover, officially sanctioned terms themselves undergo change, usually as a result of evolving understanding about the nature of disorders. With the publication of the fifth edition of the DSM in 2013, the American Psychiatric Association renamed substance abuse and substance dependence as substance use disorder. And while it officially eliminated the term addiction, it refers to substance use disorders as addictive disorders. The definitive terminology will not be written until neuroscience fully understands the nature of repetitive behaviors.