(n.) The movement of a ship backward, or with her stern foremost.

Brownian movement advance angular motion ascending ascent axial motion backflowing backing backset backsliding backward motion backward step career climbing course current descending descent downward motion drift driftage driftway ebbing flight flow flux forward motion headway lapse leeway mounting oblique motion ongoing onrush passage plunging progress radial motion random motion reaction recession recidivation recidivism reentry reflowing refluence reflux regress regression relapse retroaction retrocession retroflexion retrogradation retrogression retrusion return rising rollback run rush set setback sideward motion sinking soaring steerageway stream subsiding throwback traject trajet trend upward motion way