Of great age; very old. Of or relating to times long past, especially those of the historical period before the fall of the Western Roman Empire (A.D. 476). See Synonyms at old. Old-fashioned; antiquated. Having the qualities associated with age, wisdom, or long use; venerable. A very old person. A person who lived in times long past. The peoples of the classical nations of antiquity. The ancient Greek and Roman authors. Archaic An ensign; a flag. Obsolete A flag-bearer or lieutenant.