Source : Webster's Revised Unabridged Dictionary (1913)

March \March\, v. i. [imp. & p. p. {Marched}; p. pr. & vb. n.
   {Marching}.] [F. marcher, in OF. also, to tread, prob. fr. L.
   marcus hammer. Cf. {Mortar}.]
   1. To move with regular steps, as a soldier; to walk in a
      grave, deliberate, or stately manner; to advance steadily.
      --Shak.

   2. To proceed by walking in a body or in military order; as,
      the German army {marched} into France.

Marching \March"ing\,
   a. & n., fr. {March}, v.

   {Marching money} (Mil.), the additional pay of officer or
      soldier when his regiment is marching.

   {In marching order} (Mil.), equipped for a march.

   {Marching regiment}. (Mil.)
   (a) A regiment in active service.
   (b) In England, a regiment liable to be ordered into other
       quarters, at home or abroad; a regiment of the line.

Source : WordNet®

marching
     n : the act of marching; walking with regular steps (especially
         in a procession of some kind); "it was a long march"; "we
         heard the sound of marching" [syn: {march}]