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
The province, which plays a key role in Cuba’s agricultural production and has extensive forest coverage, is facing a combination of low rainfall, poor conditions of forest roads and an accumulation of dry vegetation that increases fire risk.
—
Maykel González, Miami Herald, 28 Dec. 2025
Torrential rainfall is also occurring with these storms and may lead to localized flooding.
—Ca Weather Bot, Sacbee.com, 27 Dec. 2025
Keep an eye on rainfall amounts and water the plants occasionally during dry periods to keep the soil moist.
—Mary Marlowe Leverette, Southern Living, 27 Dec. 2025
Particularly vulnerable to flooding were burn scars, areas that saw recent wildfires that don't absorb rainfall very well, including the sites of the Palisades and Eaton fires in January 2025.
—Jeanine Santucci, USA Today, 27 Dec. 2025
See All Example Sentences for rainfall
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Maykel González, Miami Herald, 28 Dec. 2025
Torrential rainfall is also occurring with these storms and may lead to localized flooding.
—Ca Weather Bot, Sacbee.com, 27 Dec. 2025
Keep an eye on rainfall amounts and water the plants occasionally during dry periods to keep the soil moist.
—Mary Marlowe Leverette, Southern Living, 27 Dec. 2025
Particularly vulnerable to flooding were burn scars, areas that saw recent wildfires that don't absorb rainfall very well, including the sites of the Palisades and Eaton fires in January 2025.
—Jeanine Santucci, USA Today, 27 Dec. 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 1 Jan. 2026.
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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