- Waterloo - a final crushing defeat; "he met his Waterloo"
--1 is a kind of defeat, licking
- Waterloo, Battle of Waterloo - the battle on 18 June 1815 in which Napoleon met his final defeat; Prussian and British forces under Blucher and the Duke of Wellington routed the French forces under Napoleon
--2 is a kind of pitched battle
--2 is a part of Napoleonic Wars - Waterloo, Battle of Waterloo - the battle on 18 June 1815 in which Napoleon met his final defeat; Prussian and British forces under Blucher and the Duke of Wellington routed the French forces under Napoleon