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
Flash flooding from excessive rainfall is possible in the Central Plains and Middle Mississippi Valley through the morning of July 4.
—
Jeanine Santucci,
USA Today,
3 July 2026
Aim to give cucumber plants an inch of water each week from irrigation or rainfall, and water when the top few inches of soil feel dry.
—
Karen Brewer Grossman,
Southern Living,
3 July 2026
Always check after rainfall for standing water and remove it immediately wherever possible to prevent mosquitoes.
—
The Spruce,
2 July 2026
Torrential rainfall is occurring with this storm, and may lead to flash flooding.
—
Nc Weather Bot,
Charlotte Observer,
2 July 2026
See All Example Sentences for rainfall
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Jeanine Santucci,
USA Today,
3 July 2026
Aim to give cucumber plants an inch of water each week from irrigation or rainfall, and water when the top few inches of soil feel dry.
—
Karen Brewer Grossman,
Southern Living,
3 July 2026
Always check after rainfall for standing water and remove it immediately wherever possible to prevent mosquitoes.
—
The Spruce,
2 July 2026
Torrential rainfall is occurring with this storm, and may lead to flash flooding.
—
Nc Weather Bot,
Charlotte Observer,
2 July 2026
See All Example Sentences for rainfall
Cite this Entry
“Rainfall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainfall. Accessed 5 Jul. 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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