What does "locomotive" mean?

Additional senses

1. 2.A locomotive engine; a self-propelling wheel carriage, especially one which bears a steam boiler and one or more steam engines which communicate motion to the wheels and thus propel the carriage, -- used to convey goods or passengers, or to draw wagons, railroad cars, etc. See Illustration in Appendix. Consolidation locomotive, a locomotive having four pairs of connected drivers. -- Locomotive car, a locomotive and a car combined in one vehicle; a dummy engine. [U.S.] -- Locomotive engine. Same as Locomotive, above. -- Mogul locomotive. See Mogul.