1. any sequence of activity that an individual member or a military unit may follow; 2. in wargaming, the possible COAs available to each warring party are explored along with their respective consequences and the reactions of the other parties. 2. A possible plan open to an individual or commander that would accomplish or is related to accomplishment of the mission. 3. A feasible way to accomplish a task or mission which follows the guidance given, will not result in undue damage/ risk to the command, and is noticeably different from other actions being considered.