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 risk of flooding rainfall increases by the weekend as the system approaches the coast.
—
Dinah Voyles Pulver, USA Today, 5 Aug. 2025
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
—Nc Weather Bot, Charlotte Observer, 2 Aug. 2025
Moisture that was once channeled to the leaf blades is directed to the roots and crown during dormancy to preserve the plant until rainfall returns.
—Megan Hughes, Better Homes & Gardens, 2 Aug. 2025
There is a 50% chance of rainfall in the area, Bennett said.
—Elainie Barraza, The Orlando Sentinel, 2 Aug. 2025
See All Example Sentences for rainfall
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Dinah Voyles Pulver, USA Today, 5 Aug. 2025
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
—Nc Weather Bot, Charlotte Observer, 2 Aug. 2025
Moisture that was once channeled to the leaf blades is directed to the roots and crown during dormancy to preserve the plant until rainfall returns.
—Megan Hughes, Better Homes & Gardens, 2 Aug. 2025
There is a 50% chance of rainfall in the area, Bennett said.
—Elainie Barraza, The Orlando Sentinel, 2 Aug. 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 21 Aug. 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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