n. 1. A marching back; retrocession. [ 1913 Webster ]

2. (Mil.) An evolution by which a body of troops change front or reverse the direction of march while retaining the same men in the front rank; also, a movement by which the rear rank becomes the front one, either with or without changing the right to the left. [ 1913 Webster ]

3. A change of measures; alteration of conduct. [ 1913 Webster ]

Such countermarches and retractions as we do not willingly impute to wisdom. T. Burnet. [ 1913 Webster ]

v. i. [ imp. & p. p. Countermarched p. pr. & vb. n. Countermarching. ] (Mil.) To march back, or to march in reversed order. [ 1913 Webster ]

The two armies marched and countermarched, drew near and receded. Macaulay. [ 1913 Webster ]