light engine
Noun: - A locomotive operating without any attached cars or wagons: In railway terminology, a "light engine" refers to a locomotive that is moving on its own, not pulling or pushing any rolling stock. This often occurs when the engine is being repositioned, taken to or from a depot, or undergoing testing.
- (A locomotive without cars was sent for servicing.)
- (A lone locomotive traveled through without any train attached.)
"Running light": a synonymous phrase meaning the same as "light engine."
- The engineer was instructed to run light to the next junction. (The locomotive moved without any load.)
"Light engine movement": a scheduled or unscheduled trip of a locomotive without cars.
- The railway company logged a light engine movement for crew training. (A recorded trip of a lone locomotive for practice purposes.)
Light (adj): not carrying a load; having little weight.
- The train was running light due to the absence of freight. (The train had no cargo.)
Engine (n): a machine that converts energy into mechanical motion; specifically, a locomotive.
- The engine was inspected before the light engine run. (The locomotive was checked.)
Deadhead move: a term used for a locomotive or vehicle traveling without a load or passengers.
- The deadhead move of the engine saved fuel. (The unloaded trip was efficient.)
Lone locomotive: a single engine operating independently.
- A lone locomotive chugged along the tracks. (A solitary engine moved.)
- Light as a feather: extremely light in weight (not specific to railways but related to the concept of "light").
- The light engine felt light as a feather compared to a full train. (The locomotive was unburdened.)
- Light out: to leave quickly (informal, not directly related but shares the word "light").
- The crew lit out for the depot after the light engine run. (They departed promptly.)