Procession

Antonyms of procession:
backwash, ebb, reflux, retraction, return, reversal, reverse, about-face, turnabout, turnaround, recess, recession, regress, regression, retreat, retrogression.
Examples of usage:
  1. Herschel stands at the eye- piece to watch the glorious procession of celestial objects.
    "The Story of the Heavens", Robert Stawell Ball.
  2. It appeared the elephants were wanted to take part in a procession, and for a while they let me guess what sort of a procession.
    "Caves of Terror", Talbot Mundy.
  3. Do you know, on the way from Shawport, I saw a procession of the men, and anything more terrible- It's the children I think of!
    "Hilda Lessways", Arnold Bennett.