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
When the ocean's temperatures cool (which usually happens every three to five years) that affects tropical rainfall, which in turn affects weather patterns around the world, according to the NWS.
—
Sophie Hartley, IndyStar, 29 Nov. 2025
Moderate to heavy rainfall is also expected along the western Gulf Coast, bringing a risk of isolated flash flooding.
—Jeanine Santucci, USA Today, 29 Nov. 2025
Each flat blends old-school Parisian charm with modern conveniences like contactless entry, walk-in rainfall showers, and state-of-the-art appliances.
—Annie Archer, Travel + Leisure, 29 Nov. 2025
Sri Lanka, too, has been badly hit and while officials in Southeast Asia voiced optimism that rainfall would lessen in the coming days, authorities in Colombo warned that a cyclone lashing the country was expected to keep moving along its coast today.
—Prashant Rao, semafor.com, 28 Nov. 2025
See All Example Sentences for rainfall
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Sophie Hartley, IndyStar, 29 Nov. 2025
Moderate to heavy rainfall is also expected along the western Gulf Coast, bringing a risk of isolated flash flooding.
—Jeanine Santucci, USA Today, 29 Nov. 2025
Each flat blends old-school Parisian charm with modern conveniences like contactless entry, walk-in rainfall showers, and state-of-the-art appliances.
—Annie Archer, Travel + Leisure, 29 Nov. 2025
Sri Lanka, too, has been badly hit and while officials in Southeast Asia voiced optimism that rainfall would lessen in the coming days, authorities in Colombo warned that a cyclone lashing the country was expected to keep moving along its coast today.
—Prashant Rao, semafor.com, 28 Nov. 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 5 Dec. 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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