[ uh-greyd ]
/ əˈgreɪd /
verb (used with object), ag·grad·ed, ag·grad·ing. Physical Geography.
to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like.
Related formsag·gra·da·tion [ag-ruh-dey-shuh n] /ˌæg rəˈdeɪ ʃən/, nounag·gra·da·tion·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for aggrade
Its deposits tend to aggrade (build up) the flat which its meanderings develop.The Geography of the Region about Devils Lake and the Dalles of the Wisconsin|Rollin D. Salisbury
In this way they aggrade each portion of it in turn by means of their shifting channels.The Elements of Geology|William Harmon Norton
British Dictionary definitions for aggrade
/ (əˈɡreɪd) /
(tr) to build up the level of (any land surface) by the deposition of sedimentCompare degrade (def. 4)
Derived Formsaggradation (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