waterloo

waterloo — noun

1. the decisive defeat or failure that permanently ends someone's career, ambitions

1.nounB2
Definition

the decisive defeat or failure that permanently ends someone's career, ambitions, or efforts, drawing its name from Napoleon's 1815 loss at the Battle of Waterloo.

Example

Senator Walid's primary defeat was his political Waterloo, ending thirty years in Congress.

X's Waterloo = decisive personal defeat

The champion's loss in the final match was a Waterloo that ended her chess career.

Common collocations
  • X's Waterloo
  • become X's Waterloo
  • prove to be X's Waterloo
  • a Waterloo for [someone]
Synonyms
  • downfall

    more general; does not necessarily imply a permanent or final defeat

  • ruin

    stronger, suggests total destruction of one's prospects or finances

  • nemesis

    focuses on the person or force that causes the defeat rather than the defeat itself

  • crushing defeat

    more literal and direct; lacks the historical metaphor of Waterloo

Antonyms

Grammar Patterns

X's + Waterloo

[be/become/prove to be] + X's + Waterloo

Waterloo + for + [noun phrase]

Usage Note

Always capitalised as a proper noun, since it derives from the place name Waterloo. The word is typically paired with a possessive determiner (my/your/his/her/its/X's) or used in the pattern 'a Waterloo for [someone]'. The plain uncapitalised spelling 'waterloo' is non-standard.

Common Mistakes

The project was a waterloo for the team.
The project was the team's Waterloo.
The word must be capitalised and is typically used with a possessive form.
He met his waterloo in the final exam.
The final exam was his Waterloo.
As a noun, Waterloo refers to the defeat itself; the phrase 'meet one's Waterloo' is a separate idiom (see idioms below).
Idioms

meet one's Waterloo

idiom

to suffer a final defeat or failure at the hands of a person, group, or problem that proves too difficult to overcome.

The famous singer met her Waterloo when a teenage contestant outperformed her on live television.

After ten years of winning every case, lawyer Christopher finally met his Waterloo against a young public defender.

Word family

  • Waterloos
    plural nounC1

Synonym discussion

Sense: noun/1

Waterloo carries a dramatic, almost literary tone — it suggests a single decisive event that permanently ends something important. Downfall is the closest general synonym, but it can describe a gradual decline rather than one sudden blow (e.g. 'his downfall began years earlier'). Ruin emphasises complete destruction, often financial, and can apply to a person or organisation ('gambling led to his ruin'). Nemesis shifts the focus to the agent of defeat — the person who causes it ('the young challenger became the champion's nemesis'). Crushing defeat is the most literal and direct option, lacking the historical metaphor entirely; it works in any register but feels plainer. Use Waterloo when you want a vivid, culturally understood image of a final, career-ending reversal — for instance, 'the scandal was the mayor's Waterloo,' rather than 'the mayor suffered a crushing defeat in the election,' which is factual but less memorable.

downfallruin ↗nemesiscrushing defeat

Common collocations

Nouns

Phrases

Prepositions

Etymology

FrenchEnglish

The word comes from Waterloo, a town in present-day Belgium where the Battle of Waterloo was fought on 18 June 1815. There, the French Emperor Napoleon Bonaparte was decisively defeated by the British and Prussian armies under the Duke of Wellington and Gebhard von Blücher. This defeat ended Napoleon's rule and the Napoleonic Wars. By the mid-19th century, the place name had entered general English as a common noun meaning any final, decisive defeat — especially one that ends a person's career or ambitions.