The story
From Admiral John Fisher's use of subterfuge to evade a Royal Navy moratorium on the construction of new capital ships by declaring ships of this type to be large versions of light cruisers.
Etymology from Wiktionary, CC BY-SA 4.0.
large light cruiser
Today it means: A very large, fast warship with a relatively-shallow draft and minimal belt armor, carrying a relatively-small number of very heavy guns; sometimes classed as a type of battlecruiser. Full definition →