drain·​age | \ ˈdrā-nij \

Definition of drainage

1 : the act, process, or mode of draining also : something drained off
2 : a device for draining : drain also : a system of drains
3 : an area or district drained

Examples of drainage in a Sentence

Recent Examples on the Web

Naturally, rain often falls into catchments, or drainage basins. David Grossman, Popular Mechanics, "Climate Change Will Bring Us Heavy Rains and Droughts at the Same Time," 14 Dec. 2018 The drainage basin is thought to be home to half of the world’s species of plants and animals. Austin Merrill, WSJ, "The Amazon: The Heart of the World," 3 Dec. 2018 For updates on the drainage improvement project, visit Cooper City’s website and Twitter page. Emily Bloch, Sun-Sentinel.com, "Flamingo Townhomes to undergo 'drainage improvement project'," 13 July 2018 If there's any increase in swelling, drainage, pain, or warmth, go see your doctor right away. Elizabeth Denton, Seventeen, "9 Things You Should Know Before Getting Your First Body Piercing," 12 July 2018 Jonathan Drescher, who is managing the Plaxall project, said the group would create a new drainage plan to account for added stress on the sewage system, and that the site will be engineered to mitigate flooding, not exacerbate it. New York Times, "New Buildings Rise in Flood Zones," 6 July 2018 Flash flooding can lead to water contamination by overwhelming urban drainage systems or enhancing agricultural runoff. Scott K. Johnson, Ars Technica, "US tries to bury report on climate change’s dire health, economic impacts," 26 Nov. 2018 The covering won't improve drainage, and pot shards may actually block the holes. The Editors, Good Housekeeping, "Everything You Need to Know About Container Gardening," 13 Aug. 2018 There are additional plans by the Town/Lions to fully extend the paver sidewalks, improve the playground drainage and refurbish the Lions’ drinking fountain. The Aegis, "Pavilion installed at Shamrock Park, equipment improved," 13 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'drainage.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of drainage

1652, in the meaning defined at sense 1

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Statistics for drainage

Last Updated

29 Jan 2019

Look-up Popularity

Time Traveler for drainage

The first known use of drainage was in 1652

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More Definitions for drainage



English Language Learners Definition of drainage

: the act or process of draining something : the act or process of removing water or liquid from a place or thing


drain·​age | \ ˈdrā-nij \

Kids Definition of drainage

: the act or process of removing a liquid Drainage of the flooded area has begun.


drain·​age | \ ˈdrā-nij \

Medical Definition of drainage

1 : the act or process of drawing off fluids from a cavity or wound by means of suction or gravity
2 : a process of releasing internal conflicts or pent-up feelings (as hostility or guilt)

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More from Merriam-Webster on drainage

Spanish Central: Translation of drainage

Nglish: Translation of drainage for Spanish Speakers

Britannica English: Translation of drainage for Arabic Speakers

Britannica.com: Encyclopedia article about drainage

Comments on drainage

What made you want to look up drainage? Please tell us where you read or heard it (including the quote, if possible).


to deny responsibility for

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