Definitions
1.NounThat which destroys something.
2.NounA small, fast warship with light gun armament, smaller than a cruiser, but bigger than a frigate.
3.NounA larger warship with guided missile armament, usually intended for air defence or anti-ship roles. Often, but not always, larger than a frigate and smaller than a cruiser.
A starship of comparable role.
4.NounA starship of comparable role.