1
: the amount of precipitation usually measured by the depth in inches
2
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
Torrential rainfall is occurring with this storm, and may lead to flash flooding.
—
Ca Weather Bot, Sacbee.com, 8 June 2025
Record rainfall earlier this spring has lifted Oklahoma fully out of drought conditions for the first time in nearly six years.
—Anna Skinner, MSNBC Newsweek, 6 June 2025
Even direct soil sampling is unreliable, as carbon levels swing with rainfall.
—Felicia Jackson, Forbes.com, 5 June 2025
About 30 miles east, the torrential rainfall caused the Walnut River to overflow, flooding several streets in El Dorado and sending people scrambling for safety.
—Arkansas Online, 5 June 2025
See All Example Sentences for rainfall
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Ca Weather Bot, Sacbee.com, 8 June 2025
Record rainfall earlier this spring has lifted Oklahoma fully out of drought conditions for the first time in nearly six years.
—Anna Skinner, MSNBC Newsweek, 6 June 2025
Even direct soil sampling is unreliable, as carbon levels swing with rainfall.
—Felicia Jackson, Forbes.com, 5 June 2025
About 30 miles east, the torrential rainfall caused the Walnut River to overflow, flooding several streets in El Dorado and sending people scrambling for safety.
—Arkansas Online, 5 June 2025
See All Example Sentences for rainfall
Cite this Entry
“Rainfall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainfall. Accessed 22 Jun. 2025.
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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