1. An order from a superior officer for troops to depart
   "The soldiers received their marching orders and prepared to move out"
    
2. [informal] A notice of dismissal or discharge
   "After his poor performance, he was given his marching orders";
   - walking papers [informal]

1. Military equipment and dress required for marching
   "The company was dressed in full marching order"

Type of: dismissal, dismission [rare], equipage, materiel, matériel, order, pink slip [N. Amer]