The battle that marked the end of the Napoleonic Wars (8)

I believe the answer is:

waterloo

(Other definitions for waterloo that I've seen before include "track from Sweden" , "6D 5A [TUBE STATION]" , "Where Wellington defeated Napoleon" , "Definitive battle of the Napoleonic Wars" , "Napoleon's 1815 defeat" .)

I've seen this clue in The Irish Times.

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