Civilian
For a civilian, during the Victorian and Edwardian period, this corresponded to a frock coat in the day, and white tie at night. When morning dress (in the modern sense, using a morning tailcoat rather than a frock coat) became common, it was less formal than a frock coat, and even when this was phased out, morning dress never achieved full dress status. In the twenty-first century, full dress therefore unambiguously refers to white tie.
Read more about this topic: Full Dress