What is the term for an uncoupled engine or engines directed back toward the stationary portion of the same train?

The correct term for an uncoupled engine or engines that are directed back toward the stationary portion of the same train is "Return Movement." This terminology is used in railroad operations to describe the specific action of moving locomotives back toward the trains they were previously coupled to.

Understanding this term is important because it helps railway personnel communicate clearly about the movement of trains and files in various operational scenarios. Return Movements are conducted under specific guidelines to ensure safety and efficiency, particularly when handling freight and passenger trains in busy rail yards or stations.

The other options refer to different concepts in rail operations. "Reversing Move" generally pertains to changing the direction of a train's movement, while "Backtrack Procedure" indicates a retracing of a train's path, possibly for operational adjustments. "Train Repositioning" could imply broader actions involving rearranging train configurations or positioning trains in a yard. However, in the context of the specific action described in the question, "Return Movement" is the most accurate term.