DUI and OUI are two different terms used to refer to the same offense in Massachusetts. DUI stands for “driving under the influence,” while OUI stands for “operating under the influence.” The only difference between DUI and OUI in Massachusetts is that DUI is the more commonly used term, while OUI is used specifically in Massachusetts. Both terms refer to the illegal act of operating a motor vehicle while under the influence of drugs or alcohol. In some other states, there may be a distinction between DUI and OUI, with DUI referring to driving under the influence of alcohol and OUI referring to driving under the influence of any substance, including drugs. However, in Massachusetts, both terms are used interchangeably and carry the same penalties and consequences. Therefore, in Massachusetts, there is no practical difference between DUI and OUI, and they can be used synonymously.
