aggradation

noun
ag·​gra·​da·​tion | \ˌa-grə-ˈdā-shən \

Definition of aggradation 

: a modification of the earth's surface in the direction of uniformity of grade by deposition

Keep scrolling for more

Other Words from aggradation

aggradational \ -​shnəl , -​shə-​nᵊl \ adjective

Examples of aggradation in a Sentence

Recent Examples on the Web

Number one is aggradation of the channel bed, and number two, a mega flood. Mark Schleifstein, NOLA.com, "Rising river bottom could switch Mississippi to Atchafalaya riverbed in next mega flood," 12 Dec. 2017

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

First Known Use of aggradation

1898, in the meaning defined above

History and Etymology for aggradation

aggrade "to fill with detrital material, build up by aggradation" (from ad- + -grade, as in degrade) + -ation (after degradation)

Note: Aggrade and aggradation were apparently introduced by the geologist Rollin D. Salisbury in Surface Geology: Report of Progress, from the Annual Report of the State Geologist for 1892, Trenton, N.J.: Geological Survey of New Jersey, 1893, p. 103.

Keep scrolling for more

Learn More about aggradation

Share aggradation

Statistics for aggradation

Look-up Popularity

Time Traveler for aggradation

The first known use of aggradation was in 1898

See more words from the same year

More from Merriam-Webster on aggradation

Britannica.com: Encyclopedia article about aggradation

Comments on aggradation

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

WORD OF THE DAY

something that serves to warn or remind

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!