100-year flood

noun

A flood event that has a 1% probability of occurring in any given year; an exceptionally large flood.

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Meanings

noun100-year flood (plural 100-year floods)

plural 100-year floods

  1. A flood event that has a 1% probability of occurring in any given year; an exceptionally large flood.

Translations

German Jahrhundertflut, Jahrhunderthochwasser
  • Jahrhundertflutextreme flood with a 1% annual chance of occurring
  • Jahrhunderthochwasserextreme flood with a 1% annual chance of occurring
Cite this entry
APA

100-year flood. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/100-year%20flood

MLA

“100-year flood.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/100-year%20flood. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “100-year flood,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/100-year%20flood.

Source: 100-year flood on Wiktionary, CC BY-SA 4.0.