"Steam locomotives" refer to trains that are powered by steam engines. These engines use steam created by heating water to produce energy, which is then used to move the train. Full definition
These are machines likely to hold a majority of their value for the foreseeable future, at least until that day — which, frankly, seems inevitable to me, but let's not go there — when old cars do for people what old steam locomotives do for them now. (automobilemag.com)
Tiffany had to be entirely rebuilt and is now the oldest running steam locomotive in the world. (greatrail.com)
Rail holidays in Scotland allow you to experience the beauty of the highlands, coupled with the romance of travelling by steam locomotive. (greatrail.com)