Something moved by steam, as a steamship.
A vessel in which something is steamed.
A cab was ready, and we were only just in time to catch the steamer. – Story of My Life, volumes 1-3 by Augustus J. C. Hare
A steamer does not sail in any sense. – Rollo in Geneva by Jacob Abbott
Each steamer carried as many as she could hold. – Masters of the Wheat-Lands by Harold Bindloss