1) Ethically superior position 2) Military advantage point 3) Position of moral superiority 
High ground is an area of elevated terrain which can be useful in combat. The military importance of high ground has been recognized for over 2,000 years, for example in Sun Tzu`s The Art of War, in which military leaders are advised to take high ground and let the enemy try to attack from a lower position. Fighting from an elevated position is e....
[n] - a position of superiority over opponents or competitors