al·​lu·​vi·​al | \ ə-ˈlü-vē-əl How to pronounce alluvial (audio) \

Definition of alluvial

 (Entry 1 of 2)

: relating to, composed of, or found in alluvium alluvial soil alluvial diamonds



Definition of alluvial (Entry 2 of 2)

: an alluvial deposit

Examples of alluvial in a Sentence

Recent Examples on the Web: Adjective

The seabed is covered with some 80 meters of fine silt deposited by the alluvial flow from various rivers. New York Times, "Putin Opens Bridge to Crimea, Cementing Russia’s Hold on Neighbor," 15 May 2018 Montana, Idaho, and Washington are home to some of the tallest peaks on the continent, scattered across remote wildernesses, rainforests, alluvial plains, and a matrix of lake and river systems. Porter Fox, Outside Online, "Exploring America's Forgotten Border," 1 June 2018 Where did the Falcon get those alluvial dampers that Han mentioned in The Empire Strikes Back? Dan Gvozden, The Hollywood Reporter, "74 'Star Wars' Questions 'Solo' Insisted on Answering," 1 June 2018 River sand, pump sand, batture sand and spillway sand are all fertile, alluvial soils with a slightly alkaline pH. Dan Gill,, "What is the optimal soil pH level for New Orleans lawns?," 25 May 2018 In the wild, pawpaws are often found growing in the rich, alluvial soil along rivers, creeks, and streams. Andrew Moore, Good Housekeeping, "A Beginner's Guide To Growing Pawpaw—The Delicious Fruit You're Not Eating," 12 Jan. 2018 The wave would stay the same, more or less, unchanging, identical, regardless of tidal phase, the alluvial shift of sand, or swell forecast. Alex Wilson, Outside Online, "Kelly Slater's Wave Pool Is the Future. And It's Bleak.," 7 May 2018 But even those brutal accounts of bondage in Liberia’s alluvial swamps paled next to the subjugation described by the woman whose testimony concluded Thursday’s proceedings. Jeremy Roebuck,, "Clinging to life - and a tree root - she says she evaded Liberian tormentors," 12 Oct. 2017 Bangladesh has far and away the highest population density of any sizable nation — around 3,000 people per square mile pack the alluvial plain that spans most of the country. Max Bearak, Washington Post, "How Bangladeshis are coping with half a million new Rohingya refugees," 29 Sep. 2017

Recent Examples on the Web: Noun

Key to that fight is destroying and seizing the costly heavy machinery that’s being used in the operations — most blatantly the diggers and dredges employed in riverside, or alluvial, mining. Jim Wyss And Kyra Gurney, miamiherald, "Dirty gold is the new cocaine in Colombia — and it’s just as bloody," 16 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'alluvial.' 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 alluvial


1771, in the meaning defined above


1816, in the meaning defined above

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Time Traveler for alluvial

The first known use of alluvial was in 1771

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English Language Learners Definition of alluvial

geology : made up of or found in the materials that are left by the water of rivers, floods, etc.

More from Merriam-Webster on alluvial

Rhyming Dictionary: Words that rhyme with alluvial

Nglish: Translation of alluvial for Spanish Speakers

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having a desire to acquire more things

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