battleship

noun

1. A large capital warship displacing thousands to tens of thousands of tons, heavily armoured and armed with large-caliber guns; now obsolescent and replaced by smaller vessels with guided missiles.
2. (broadly)A starship of comparable role.
3. (archaic)A ship of the line.
4. A non-functional rocket stage, used for configuration and integration tests.
5. A guessing game played on grid paper or a gameboard inspired by it.