@gunfighter zeck
The term is Dreadnought. It described a ship that had many evolutionary changes, which combined made the ship revolutionary.
It was named because it was the first ship made with these changes, despite being designed after a more advanced design by the United States called South Carolina (which was more like the best battleship designs like Bismarck, Yamato, etc...).
Battleships were always afraid of something. When the Dreadnought and South Carolina were designed, torpedoes were greatly feared by all nations, and in fact had enormous influence on battles such as Jutland, despite their lack of use in that battle. The fear of them several times influenced British decision making, as they thought they were being lured over of a trap of U-Boats.
In WW II, aircraft became the biggest problems, and some Battleships (or really a Battlecruiser, but it was called a BB) like the Iowa class were designed primarily to escort aircraft carriers, and present an extremely effective air defense for them (as well as being able to deal with anything but 'real' battleships, like the Yamato and Musashi, which focuses on armament and armor, rather than speed). These ships were relatively lightly armored (for their size), and extremely fast (so they could keep up with the CVs they were protecting).