D defs.my
Entry 1 sense Webster, 1913

Right-about

· Right·-a·bout · IPA
01 n. A turning directly about by the right, so as to face in the opposite direction; also, the quarter directly opposite; as, to turn to the rig…
  1. 1.
    A turning directly about by the right, so as to face in the opposite direction; also, the quarter directly opposite; as, to turn to the right-about.
Phrases & compounds
To send to the right-about — to cause to turn toward the opposite point or quarter; -- hence, of troops, to cause to turn and retreat.