1
: the amount of precipitation usually measured by the depth in inches
2
Synonyms
Examples of rainfall in a Sentence
This area has an average annual rainfall of 12 inches.
an increase in annual rainfall
Recent Examples on the Web
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
—
Star-Telegram Bot, Fort Worth Star-Telegram, 22 May 2024
Flash flooding, defined as a rapid rise in water levels, can occur quickly due to intense rainfall.
—Doyle Rice, USA TODAY, 20 May 2024
See all Example Sentences for rainfall 
Star-Telegram Bot, Fort Worth Star-Telegram, 22 May 2024
Flash flooding, defined as a rapid rise in water levels, can occur quickly due to intense rainfall.
—Doyle Rice, USA TODAY, 20 May 2024
See all Example Sentences for rainfall
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'rainfall.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Rainfall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainfall. Accessed 28 May. 2024.
Copy CitationKids Definition
rainfall
noun
rain·fall
-ˌfȯl 
1
: a fall of rain
2
: amount of precipitation
an annual rainfall of 20 inches
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