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aggrade

[uh-greyd] /əˈgreɪd/
verb (used with object), aggraded, aggrading. Physical Geography.
1.
to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like.
Compare degrade.
Origin of aggrade
1895-1900
First recorded in 1895-1900; ag- + grade
Related forms
aggradation
[ag-ruh-dey-shuh n] /ˌæg rəˈdeɪ ʃən/ (Show IPA),
noun
aggradational, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for aggradation

aggrade

/əˈɡreɪd/
verb
1.
(transitive) to build up the level of (any land surface) by the deposition of sediment Compare degrade (sense 4)
Derived Forms
aggradation (ˌæɡrəˈdeɪʃən) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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