Movement toward a stated end, and the measure of how far along it is. Progress names a direction; it does not promise arrival.
Latin progressus (an advance, a going forward), from progredi (to go forward): pro- (forward) + gradi (to step, to walk); progress is, at its root, simply steps taken in a stated direction.
Movement toward a stated end, and the measure of how far along that movement has gone. The root promises only direction — arrival is a separate and later claim.