100-year flood
100-year flood noun: a flood event that has a 1% probability of occurring in any given year; an exceptionally large flood.

Noun
100-year flood (plural 100-year floods)
- A flood event that has a 1% probability of occurring in any given year; an exceptionally large flood.
Forms of 100-year flood
| plural | 100-year floods |
|---|
Questions about 100-year flood
- What does 100-year flood mean?
- 100-year flood means a flood event that has a 1% probability of occurring in any given year; an exceptionally large flood.
- What part of speech is 100-year flood?
- 100-year flood is a noun.
- What is the plural of 100-year flood?
- The plural of 100-year flood is 100-year floods.
Words near 100-year flood in the dictionary
Source and license
Adapted from Wiktionary: 100-year flood (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Cite this entry: “100-year flood.” Word.ws, https://word.ws/100-year_flood. Based on Wiktionary, CC BY-SA 4.0.
