'Steamship' definitions:
Definition of 'steamship'
From: WordNet
noun
A ship powered by one or more steam engines [syn: steamer, steamship]
Definition of 'Steamship'
From: GCIDE
- Steamship \Steam"ship`\ (-sh[i^]p`), n. A ship or seagoing vessel propelled by the power of steam; a steamer. [1913 Webster]