double harness
noun
1.
harness for a pair of horses.
Idioms
2.
in double harness,
Informal.
married.
Origin
1865-70,
Americanism
Examples from the web for
double harness
Besides, housekeeping in
double harness
was a vastly different matter from going it single.
Sundays night and carried away a light spring wagon harness, a light
double harness
and two blankets.