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
During periods of intense rainfall, the risk of flooding increases, particularly in low-lying and flood-prone areas.
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Ca Weather Bot, Sacbee.com, 6 Sep. 2025
Add Mulch Garlic usually doesn’t need to be watered in autumn as rainfall is abundant at this time of the year.
—Lauren Landers, Better Homes & Gardens, 6 Sep. 2025
Torrential rainfall is also occurring with these storms and may lead to localized flooding.
—Nc Weather Bot, Charlotte Observer, 6 Sep. 2025
Plus, a bathroom that’s unapologetically indulgent—dressed with a deep soaking tub, rainfall shower, and vanity mirrors that shimmer like stage lights.
—Lewis Nunn, Forbes.com, 6 Sep. 2025
See All Example Sentences for rainfall
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Ca Weather Bot, Sacbee.com, 6 Sep. 2025
Add Mulch Garlic usually doesn’t need to be watered in autumn as rainfall is abundant at this time of the year.
—Lauren Landers, Better Homes & Gardens, 6 Sep. 2025
Torrential rainfall is also occurring with these storms and may lead to localized flooding.
—Nc Weather Bot, Charlotte Observer, 6 Sep. 2025
Plus, a bathroom that’s unapologetically indulgent—dressed with a deep soaking tub, rainfall shower, and vanity mirrors that shimmer like stage lights.
—Lewis Nunn, Forbes.com, 6 Sep. 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 9 Sep. 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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