WordNet
double bar
n. notation marking the end of principal parts of a musical composition; two adjacent bar lines
Usage examples of "double bar".
It was a tubular aluminum lawn chair, the kind with a double bar for the armrests.
When Teddy had emerged from the Gringg shuttle at the Double Bar Gemini, he was also a much chastened person.
All the doors beyond were locked by a double bar system, one lateral, one reaching from the ceiling to the floor and slipping into steel-clad holes.